feat(i18n): Added support for Chinese language pack

ui/bun.lock

@@ -28,12 +28,14 @@
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "date-fns": "^4.1.0",
+        "i18next": "^25.8.13",
         "lucide-react": "^0.556.0",
         "prism-react-renderer": "^2.4.1",
         "react": "^19.2.0",
         "react-day-picker": "^9.12.0",
         "react-dom": "^19.2.0",
         "react-hook-form": "^7.68.0",
+        "react-i18next": "^16.5.4",
         "react-resizable-panels": "^3.0.6",
         "react-router-dom": "^7.10.1",
         "react-simple-code-editor": "^0.14.1",
@@ -761,10 +763,14 @@
 
     "html-escaper": ["html-escaper@2.0.2", "", {}, "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg=="],
 
+    "html-parse-stringify": ["html-parse-stringify@3.0.1", "", { "dependencies": { "void-elements": "3.1.0" } }, "sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg=="],
+
     "http-proxy-agent": ["http-proxy-agent@7.0.2", "", { "dependencies": { "agent-base": "^7.1.0", "debug": "^4.3.4" } }, "sha512-T1gkAiYYDWYx3V5Bmyu7HcfcvL7mUrTWiM6yOfa3PIphViJ/gFPbvidQ+veqSOHci/PxBcDabeUNCzpOODJZig=="],
 
     "https-proxy-agent": ["https-proxy-agent@7.0.6", "", { "dependencies": { "agent-base": "^7.1.2", "debug": "4" } }, "sha512-vK9P5/iUfdl95AI+JVyUuIcVtd4ofvtrOr3HNtM2yxC9bnMbEdp3x01OhQNnjb8IJYi38VlTE3mBXwcfvywuSw=="],
 
+    "i18next": ["i18next@25.8.13", "", { "dependencies": { "@babel/runtime": "^7.28.4" }, "peerDependencies": { "typescript": "^5" }, "optionalPeers": ["typescript"] }, "sha512-E0vzjBY1yM+nsFrtgkjLhST2NBkirkvOVoQa0MSldhsuZ3jUge7ZNpuwG0Cfc74zwo5ZwRzg3uOgT+McBn32iA=="],
+
     "iconv-lite": ["iconv-lite@0.6.3", "", { "dependencies": { "safer-buffer": ">= 2.1.2 < 3.0.0" } }, "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw=="],
 
     "ignore": ["ignore@5.3.2", "", {}, "sha512-hsBTNUqQTDwkWtcdYI2i06Y/nUBEsNEDJKjWdigLvegy8kDuJAS8uRlpkkcQpyEXL0Z/pjDy5HBmMjRCJ2gq+g=="],
@@ -931,6 +937,8 @@
 
     "react-hook-form": ["react-hook-form@7.68.0", "", { "peerDependencies": { "react": "^16.8.0 || ^17 || ^18 || ^19" } }, "sha512-oNN3fjrZ/Xo40SWlHf1yCjlMK417JxoSJVUXQjGdvdRCU07NTFei1i1f8ApUAts+IVh14e4EdakeLEA+BEAs/Q=="],
 
+    "react-i18next": ["react-i18next@16.5.4", "", { "dependencies": { "@babel/runtime": "^7.28.4", "html-parse-stringify": "^3.0.1", "use-sync-external-store": "^1.6.0" }, "peerDependencies": { "i18next": ">= 25.6.2", "react": ">= 16.8.0", "typescript": "^5" }, "optionalPeers": ["typescript"] }, "sha512-6yj+dcfMncEC21QPhOTsW8mOSO+pzFmT6uvU7XXdvM/Cp38zJkmTeMeKmTrmCMD5ToT79FmiE/mRWiYWcJYW4g=="],
+
     "react-is": ["react-is@18.3.1", "", {}, "sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg=="],
 
     "react-refresh": ["react-refresh@0.18.0", "", {}, "sha512-QgT5//D3jfjJb6Gsjxv0Slpj23ip+HtOpnNgnb2S5zU3CB26G/IDPGoy4RJB42wzFE46DRsstbW6tKHoKbhAxw=="],
@@ -1069,12 +1077,16 @@
 
     "use-sidecar": ["use-sidecar@1.1.3", "", { "dependencies": { "detect-node-es": "^1.1.0", "tslib": "^2.0.0" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-Fedw0aZvkhynoPYlA5WXrMCAMm+nSWdZt6lzJQ7Ok8S6Q+VsHmHpRWndVRJ8Be0ZbkfPc5LRYH+5XrzXcEeLRQ=="],
 
+    "use-sync-external-store": ["use-sync-external-store@1.6.0", "", { "peerDependencies": { "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0" } }, "sha512-Pp6GSwGP/NrPIrxVFAIkOQeyw8lFenOHijQWkUTrDvrF4ALqylP2C/KCkeS9dpUM3KvYRQhna5vt7IL95+ZQ9w=="],
+
     "victory-vendor": ["victory-vendor@36.9.2", "", { "dependencies": { "@types/d3-array": "^3.0.3", "@types/d3-ease": "^3.0.0", "@types/d3-interpolate": "^3.0.1", "@types/d3-scale": "^4.0.2", "@types/d3-shape": "^3.1.0", "@types/d3-time": "^3.0.0", "@types/d3-timer": "^3.0.0", "d3-array": "^3.1.6", "d3-ease": "^3.0.1", "d3-interpolate": "^3.0.1", "d3-scale": "^4.0.2", "d3-shape": "^3.1.0", "d3-time": "^3.0.0", "d3-timer": "^3.0.1" } }, "sha512-PnpQQMuxlwYdocC8fIJqVXvkeViHYzotI+NJrCuav0ZYFoq912ZHBk3mCeuj+5/VpodOjPe1z0Fk2ihgzlXqjQ=="],
 
     "vite": ["vite@7.2.6", "", { "dependencies": { "esbuild": "^0.25.0", "fdir": "^6.5.0", "picomatch": "^4.0.3", "postcss": "^8.5.6", "rollup": "^4.43.0", "tinyglobby": "^0.2.15" }, "optionalDependencies": { "fsevents": "~2.3.3" }, "peerDependencies": { "@types/node": "^20.19.0 || >=22.12.0", "jiti": ">=1.21.0", "less": "^4.0.0", "lightningcss": "^1.21.0", "sass": "^1.70.0", "sass-embedded": "^1.70.0", "stylus": ">=0.54.8", "sugarss": "^5.0.0", "terser": "^5.16.0", "tsx": "^4.8.1", "yaml": "^2.4.2" }, "optionalPeers": ["@types/node", "jiti", "less", "lightningcss", "sass", "sass-embedded", "stylus", "sugarss", "terser", "tsx", "yaml"], "bin": { "vite": "bin/vite.js" } }, "sha512-tI2l/nFHC5rLh7+5+o7QjKjSR04ivXDF4jcgV0f/bTQ+OJiITy5S6gaynVsEM+7RqzufMnVbIon6Sr5x1SDYaQ=="],
 
     "vitest": ["vitest@4.0.16", "", { "dependencies": { "@vitest/expect": "4.0.16", "@vitest/mocker": "4.0.16", "@vitest/pretty-format": "4.0.16", "@vitest/runner": "4.0.16", "@vitest/snapshot": "4.0.16", "@vitest/spy": "4.0.16", "@vitest/utils": "4.0.16", "es-module-lexer": "^1.7.0", "expect-type": "^1.2.2", "magic-string": "^0.30.21", "obug": "^2.1.1", "pathe": "^2.0.3", "picomatch": "^4.0.3", "std-env": "^3.10.0", "tinybench": "^2.9.0", "tinyexec": "^1.0.2", "tinyglobby": "^0.2.15", "tinyrainbow": "^3.0.3", "vite": "^6.0.0 || ^7.0.0", "why-is-node-running": "^2.3.0" }, "peerDependencies": { "@edge-runtime/vm": "*", "@opentelemetry/api": "^1.9.0", "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0", "@vitest/browser-playwright": "4.0.16", "@vitest/browser-preview": "4.0.16", "@vitest/browser-webdriverio": "4.0.16", "@vitest/ui": "4.0.16", "happy-dom": "*", "jsdom": "*" }, "optionalPeers": ["@edge-runtime/vm", "@opentelemetry/api", "@types/node", "@vitest/browser-playwright", "@vitest/browser-preview", "@vitest/browser-webdriverio", "@vitest/ui", "happy-dom", "jsdom"], "bin": { "vitest": "vitest.mjs" } }, "sha512-E4t7DJ9pESL6E3I8nFjPa4xGUd3PmiWDLsDztS2qXSJWfHtbQnwAWylaBvSNY48I3vr8PTqIZlyK8TE3V3CA4Q=="],
 
+    "void-elements": ["void-elements@3.1.0", "", {}, "sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w=="],
+
     "w3c-xmlserializer": ["w3c-xmlserializer@5.0.0", "", { "dependencies": { "xml-name-validator": "^5.0.0" } }, "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA=="],
 
     "webidl-conversions": ["webidl-conversions@8.0.0", "", {}, "sha512-n4W4YFyz5JzOfQeA8oN7dUYpR+MBP3PIUsn2jLjWXwK5ASUzt0Jc/A5sAUZoCYFJRGF0FBKJ+1JjN43rNdsQzA=="],

ui/package.json

@@ -42,12 +42,14 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
+    "i18next": "^25.8.13",
     "lucide-react": "^0.556.0",
     "prism-react-renderer": "^2.4.1",
     "react": "^19.2.0",
     "react-day-picker": "^9.12.0",
     "react-dom": "^19.2.0",
     "react-hook-form": "^7.68.0",
+    "react-i18next": "^16.5.4",
     "react-resizable-panels": "^3.0.6",
     "react-router-dom": "^7.10.1",
     "react-simple-code-editor": "^0.14.1",

ui/src/App.tsx

@@ -3,6 +3,7 @@ import { BrowserRouter, Routes, Route } from 'react-router-dom';
 import { QueryClientProvider } from '@tanstack/react-query';
 import { Toaster } from 'sonner';
 import { queryClient } from '@/lib/query-client';
+import '@/lib/i18n';
 import { ThemeProvider } from '@/components/layout/theme-provider';
 import { PrivacyProvider } from '@/contexts/privacy-context';
 import { AuthProvider } from '@/contexts/auth-context';

ui/src/components/account/account-safety-warning-card.tsx

@@ -3,6 +3,7 @@ import { Badge } from '@/components/ui/badge';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 import { RISK_ACK_PHRASE } from '@/components/account/antigravity-responsibility-constants';
 
 interface AccountSafetyWarningCardProps {
@@ -24,21 +25,14 @@ export function AccountSafetyWarningCard({
   disabled = false,
   showProxySettingsLink = false,
 }: AccountSafetyWarningCardProps) {
-  const title = 'OAuth Account Safety Warning';
-  const subtitle = 'Issue #509 · Gemini + AGY OAuth risk';
-  const firstLine = (
-    <>
-      Issue #509 documents suspension/ban reports tied to <code className="font-mono">ccs agy</code>{' '}
-      and shared-account usage between <code className="font-mono">ccs gemini</code> and{' '}
-      <code className="font-mono">ccs agy</code>.
-    </>
-  );
-  const secondLine = (
-    <>Continue only if you accept full responsibility for OAuth and account-access risk.</>
-  );
+  const { t } = useTranslation();
+  const title = t('accountSafetyWarning.title');
+  const subtitle = t('accountSafetyWarning.subtitle');
+  const firstLine = t('accountSafetyWarning.firstLine');
+  const secondLine = t('accountSafetyWarning.secondLine');
   const issueUrl = 'https://github.com/kaitranntt/ccs/issues/509';
-  const issueLabel = 'Read issue #509';
-  const proxySettingsLabel = 'Gemini + AGY controls: Settings > Proxy';
+  const issueLabel = t('accountSafetyWarning.issueLabel');
+  const proxySettingsLabel = t('accountSafetyWarning.proxySettingsLabel');
 
   return (
     <section

ui/src/components/account/accounts-table.tsx

@@ -25,6 +25,7 @@ import {
   AlertDialogTitle,
 } from '@/components/ui/alert-dialog';
 import { Check, CheckCheck, Pencil, RotateCcw, Trash2 } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { EditAccountContextDialog } from '@/components/account/edit-account-context-dialog';
 import {
   useSetDefaultAccount,
@@ -40,6 +41,7 @@ interface AccountsTableProps {
 }
 
 export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
+  const { t } = useTranslation();
   const setDefaultMutation = useSetDefaultAccount();
   const deleteMutation = useDeleteAccount();
   const resetDefaultMutation = useResetDefaultAccount();
@@ -50,14 +52,14 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
   const columns: ColumnDef<Account>[] = [
     {
       accessorKey: 'name',
-      header: 'Name',
+      header: t('accountsTable.name'),
       size: 200,
       cell: ({ row }) => (
         <div className="flex items-center gap-2">
           <span className="font-medium">{row.original.name}</span>
           {row.original.name === defaultAccount && (
             <span className="text-xs bg-primary/10 text-primary px-1.5 py-0.5 rounded border border-primary/20">
-              default
+              {t('accountsTable.defaultBadge')}
             </span>
           )}
         </div>
@@ -65,7 +67,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
     },
     {
       accessorKey: 'type',
-      header: 'Type',
+      header: t('accountsTable.type'),
       size: 100,
       cell: ({ row }) => (
         <span className="capitalize text-muted-foreground">{row.original.type || 'oauth'}</span>
@@ -73,7 +75,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
     },
     {
       accessorKey: 'created',
-      header: 'Created',
+      header: t('accountsTable.created'),
       size: 150,
       cell: ({ row }) => {
         const date = new Date(row.original.created);
@@ -82,7 +84,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
     },
     {
       accessorKey: 'last_used',
-      header: 'Last Used',
+      header: t('accountsTable.lastUsed'),
       size: 150,
       cell: ({ row }) => {
         if (!row.original.last_used) return <span className="text-muted-foreground/50">-</span>;
@@ -92,7 +94,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
     },
     {
       id: 'context',
-      header: 'History Sync',
+      header: t('accountsTable.historySync'),
       size: 170,
       cell: ({ row }) => {
         if (row.original.type === 'cliproxy') {
@@ -103,32 +105,42 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
         if (mode === 'shared') {
           const group = row.original.context_group || 'default';
           if (row.original.continuity_mode === 'deeper') {
-            return <span className="text-muted-foreground">shared ({group}, deeper)</span>;
+            return (
+              <span className="text-muted-foreground">
+                {t('accountsTable.sharedGroupDeeper', { group })}
+              </span>
+            );
           }
 
           if (row.original.continuity_inferred) {
             return (
               <span className="text-amber-700 dark:text-amber-400">
-                shared ({group}, standard legacy)
+                {t('accountsTable.sharedGroupLegacy', { group })}
               </span>
             );
           }
 
-          return <span className="text-muted-foreground">shared ({group}, standard)</span>;
+          return (
+            <span className="text-muted-foreground">
+              {t('accountsTable.sharedGroupStandard', { group })}
+            </span>
+          );
         }
 
         if (row.original.context_inferred) {
           return (
-            <span className="text-amber-700 dark:text-amber-400">isolated (legacy default)</span>
+            <span className="text-amber-700 dark:text-amber-400">
+              {t('accountsTable.isolatedLegacy')}
+            </span>
           );
         }
 
-        return <span className="text-muted-foreground">isolated</span>;
+        return <span className="text-muted-foreground">{t('accountsTable.isolated')}</span>;
       },
     },
     {
       id: 'actions',
-      header: 'Actions',
+      header: t('accountsTable.actions'),
       size: 220,
       cell: ({ row }) => {
         const isDefault = row.original.name === defaultAccount;
@@ -149,10 +161,10 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
                 className="h-8 px-2"
                 disabled={isPending}
                 onClick={() => setContextTarget(row.original)}
-                title="Edit sync mode, group, and continuity depth"
+                title={t('accountsTable.syncTitle')}
               >
                 <Pencil className="w-3.5 h-3.5 mr-1" />
-                Sync
+                {t('accountsTable.sync')}
               </Button>
             )}
             {!isCliproxy && hasLegacyInference && (
@@ -177,10 +189,10 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
                         : undefined,
                   })
                 }
-                title="Confirm this legacy account's current mode as explicit"
+                title={t('accountsTable.confirmLegacyTitle')}
               >
                 <CheckCheck className="w-3 h-3 mr-1" />
-                Confirm
+                {t('accountsTable.confirm')}
               </Button>
             )}
             <Button
@@ -191,7 +203,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
               onClick={() => setDefaultMutation.mutate(row.original.name)}
             >
               <Check className={`w-3 h-3 mr-1 ${isDefault ? 'opacity-50' : ''}`} />
-              {isDefault ? 'Active' : 'Set Default'}
+              {isDefault ? t('accountsTable.active') : t('accountsTable.setDefault')}
             </Button>
             <Button
               variant="ghost"
@@ -199,7 +211,11 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
               className="h-8 px-2 text-destructive hover:text-destructive hover:bg-destructive/10"
               disabled={isDefault || isPending}
               onClick={() => setDeleteTarget(row.original.name)}
-              title={isDefault ? 'Cannot delete default account' : 'Delete account'}
+              title={
+                isDefault
+                  ? t('accountsTable.cannotDeleteDefault')
+                  : t('accountsTable.deleteAccount')
+              }
             >
               <Trash2 className="w-4 h-4" />
             </Button>
@@ -218,10 +234,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
 
   if (data.length === 0) {
     return (
-      <div className="text-center py-8 text-muted-foreground">
-        No CCS auth accounts found. Use{' '}
-        <code className="text-sm bg-muted px-1 rounded">ccs auth create</code> to add accounts.
-      </div>
+      <div className="text-center py-8 text-muted-foreground">{t('accountsTable.noAccounts')}</div>
     );
   }
 
@@ -279,7 +292,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
               disabled={resetDefaultMutation.isPending}
             >
               <RotateCcw className="w-4 h-4 mr-2" />
-              Reset to CCS Default
+              {t('accountsTable.resetToDefault')}
             </Button>
           </div>
         )}
@@ -293,14 +306,13 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
       <AlertDialog open={!!deleteTarget} onOpenChange={(open) => !open && setDeleteTarget(null)}>
         <AlertDialogContent>
           <AlertDialogHeader>
-            <AlertDialogTitle>Delete Account</AlertDialogTitle>
+            <AlertDialogTitle>{t('accountsTable.deleteDialogTitle')}</AlertDialogTitle>
             <AlertDialogDescription>
-              Are you sure you want to delete the account &quot;{deleteTarget}&quot;? This will
-              remove the profile and all its session data. This action cannot be undone.
+              {t('accountsTable.deleteDialogDesc', { name: deleteTarget ?? '' })}
             </AlertDialogDescription>
           </AlertDialogHeader>
           <AlertDialogFooter>
-            <AlertDialogCancel>Cancel</AlertDialogCancel>
+            <AlertDialogCancel>{t('accountsTable.cancel')}</AlertDialogCancel>
             <AlertDialogAction
               className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
               onClick={() => {
@@ -310,7 +322,7 @@ export function AccountsTable({ data, defaultAccount }: AccountsTableProps) {
                 }
               }}
             >
-              Delete
+              {t('accountsTable.delete')}
             </AlertDialogAction>
           </AlertDialogFooter>
         </AlertDialogContent>

ui/src/components/account/add-account-dialog.tsx

@@ -45,6 +45,7 @@ import {
   KIRO_AUTH_METHOD_OPTIONS,
 } from '@/lib/provider-config';
 import type { KiroAuthMethod } from '@/lib/provider-config';
+import { useTranslation } from 'react-i18next';
 import { toast } from 'sonner';
 
 interface AddAccountDialogProps {
@@ -76,6 +77,7 @@ export function AddAccountDialog({
   const [agyAckBypassEnabled, setAgyAckBypassEnabled] = useState(false);
   const [agyAckBypassLoading, setAgyAckBypassLoading] = useState(false);
   const [kiroAuthMethod, setKiroAuthMethod] = useState<KiroAuthMethod>(DEFAULT_KIRO_AUTH_METHOD);
+  const { t } = useTranslation();
   const wasAuthenticatingRef = useRef(false);
   const authFlow = useCliproxyAuthFlow();
   const kiroImportMutation = useKiroImport();
@@ -318,13 +320,13 @@ export function AddAccountDialog({
         }}
       >
         <DialogHeader>
-          <DialogTitle>Add {displayName} Account</DialogTitle>
+          <DialogTitle>{t('addAccountDialog.title', { displayName })}</DialogTitle>
           <DialogDescription>
             {isKiro
-              ? 'Choose a Kiro auth method, then authenticate via browser or import from Kiro IDE.'
+              ? t('addAccountDialog.descKiro')
               : isDeviceCode
-                ? 'Click Authenticate. A verification code will appear for you to enter on the provider website.'
-                : 'Click Authenticate to get an OAuth URL. Open it in any browser to sign in.'}
+                ? t('addAccountDialog.descDeviceCode')
+                : t('addAccountDialog.descOauth')}
           </DialogDescription>
         </DialogHeader>
 
@@ -344,10 +346,9 @@ export function AddAccountDialog({
             <div className="rounded-lg border border-amber-400/35 bg-amber-50/70 p-3 text-xs text-amber-900 dark:border-amber-800/60 dark:bg-amber-950/25 dark:text-amber-100">
               <div className="mb-1.5 flex items-center gap-1.5 font-semibold">
                 <ShieldAlert className="h-3.5 w-3.5" />
-                Power user mode enabled
+                {t('addAccountDialog.powerUserEnabled')}
               </div>
-              AGY responsibility checklist is skipped from Settings {'>'} Proxy. You accept full
-              responsibility for OAuth/account risk.
+              {t('addAccountDialog.powerUserSkipped')}
             </div>
           )}
 
@@ -367,7 +368,7 @@ export function AddAccountDialog({
           {/* Kiro auth method */}
           {isKiro && !showAuthUI && (
             <div className="space-y-2">
-              <Label htmlFor="kiro-auth-method">Auth Method</Label>
+              <Label htmlFor="kiro-auth-method">{t('addAccountDialog.authMethod')}</Label>
               <Select
                 value={kiroAuthMethod}
                 onValueChange={(value) => {
@@ -376,7 +377,7 @@ export function AddAccountDialog({
                 }}
               >
                 <SelectTrigger id="kiro-auth-method">
-                  <SelectValue placeholder="Select Kiro auth method" />
+                  <SelectValue placeholder={t('addAccountDialog.selectKiroAuthMethod')} />
                 </SelectTrigger>
                 <SelectContent>
                   {KIRO_AUTH_METHOD_OPTIONS.map((option) => (
@@ -394,7 +395,9 @@ export function AddAccountDialog({
           {!showAuthUI && (
             <div className="space-y-2">
               <Label htmlFor="nickname">
-                {requiresNickname ? 'Nickname (required)' : 'Nickname (optional)'}
+                {requiresNickname
+                  ? t('addAccountDialog.nicknameRequired')
+                  : t('addAccountDialog.nicknameOptional')}
               </Label>
               <div className="flex items-center gap-2">
                 <User className="w-4 h-4 text-muted-foreground" />
@@ -405,15 +408,15 @@ export function AddAccountDialog({
                     setNickname(e.target.value);
                     setLocalError(null);
                   }}
-                  placeholder="e.g., work, personal"
+                  placeholder={t('addAccountDialog.nicknamePlaceholder')}
                   disabled={isPending}
                   className="flex-1"
                 />
               </div>
               <p className="text-xs text-muted-foreground">
                 {requiresNickname
-                  ? 'Required for this provider. Use a unique friendly name (e.g., work, personal).'
-                  : 'A friendly name to identify this account. Auto-generated from email if left empty.'}
+                  ? t('addAccountDialog.nicknameRequiredHint')
+                  : t('addAccountDialog.nicknameOptionalHint')}
               </p>
             </div>
           )}
@@ -425,12 +428,12 @@ export function AddAccountDialog({
               <div className="text-center">
                 <p className="text-sm text-muted-foreground">
                   <Loader2 className="w-4 h-4 inline mr-2 animate-spin" />
-                  Waiting for authentication...
+                  {t('addAccountDialog.waitingForAuth')}
                 </p>
                 <p className="text-xs text-muted-foreground mt-1">
                   {authFlow.isDeviceCodeFlow
-                    ? 'A verification code dialog will appear shortly. Enter the code on the provider website.'
-                    : 'Complete the authentication in your browser. This dialog closes automatically.'}
+                    ? t('addAccountDialog.deviceCodeHint')
+                    : t('addAccountDialog.browserHint')}
                 </p>
               </div>
 
@@ -438,7 +441,7 @@ export function AddAccountDialog({
               {authFlow.authUrl && !authFlow.isDeviceCodeFlow && (
                 <div className="space-y-3">
                   <div className="space-y-2">
-                    <Label className="text-xs">Open this URL in any browser to sign in:</Label>
+                    <Label className="text-xs">{t('addAccountDialog.openUrlLabel')}</Label>
                     <div className="p-3 bg-muted rounded-md">
                       <p className="text-xs text-muted-foreground break-all font-mono line-clamp-3">
                         {authFlow.authUrl}
@@ -448,12 +451,12 @@ export function AddAccountDialog({
                           {copied ? (
                             <>
                               <Check className="w-3 h-3 mr-1" />
-                              Copied
+                              {t('addAccountDialog.copied')}
                             </>
                           ) : (
                             <>
                               <Copy className="w-3 h-3 mr-1" />
-                              Copy
+                              {t('addAccountDialog.copy')}
                             </>
                           )}
                         </Button>
@@ -464,15 +467,12 @@ export function AddAccountDialog({
                             if (!authFlow.authUrl) return;
                             const popup = window.open(authFlow.authUrl, '_blank');
                             if (!popup || popup.closed || typeof popup.closed === 'undefined') {
-                              toast.warning(
-                                'Popup blocked. Copy the URL above and open it manually in your browser.',
-                                { duration: 5000 }
-                              );
+                              toast.warning(t('addAccountDialog.popupBlocked'), { duration: 5000 });
                             }
                           }}
                         >
                           <ExternalLink className="w-3 h-3 mr-1" />
-                          Open
+                          {t('addAccountDialog.open')}
                         </Button>
                       </div>
                     </div>
@@ -481,13 +481,13 @@ export function AddAccountDialog({
                   {/* Callback paste field */}
                   <div className="space-y-2">
                     <Label htmlFor="callback-url" className="text-xs">
-                      Redirect didn&apos;t work? Paste the callback URL:
+                      {t('addAccountDialog.redirectPasteLabel')}
                     </Label>
                     <Input
                       id="callback-url"
                       value={callbackUrl}
                       onChange={(e) => setCallbackUrl(e.target.value)}
-                      placeholder="Paste the redirect URL here..."
+                      placeholder={t('addAccountDialog.callbackPlaceholder')}
                       className="font-mono text-xs"
                     />
                     <Button
@@ -499,10 +499,10 @@ export function AddAccountDialog({
                       {authFlow.isSubmittingCallback ? (
                         <>
                           <Loader2 className="w-3 h-3 mr-1 animate-spin" />
-                          Submitting...
+                          {t('addAccountDialog.submitting')}
                         </>
                       ) : (
-                        'Submit Callback'
+                        t('addAccountDialog.submitCallback')
                       )}
                     </Button>
                   </div>
@@ -511,7 +511,7 @@ export function AddAccountDialog({
 
               {!authFlow.authUrl && !authFlow.isDeviceCodeFlow && (
                 <p className="text-xs text-center text-muted-foreground">
-                  Preparing sign-in URL...
+                  {t('addAccountDialog.preparingUrl')}
                 </p>
               )}
             </div>
@@ -524,26 +524,26 @@ export function AddAccountDialog({
           {kiroImportMutation.isPending && (
             <p className="text-sm text-center text-muted-foreground">
               <Loader2 className="w-4 h-4 inline mr-2 animate-spin" />
-              Importing token from Kiro IDE...
+              {t('addAccountDialog.importingToken')}
             </p>
           )}
 
           {/* Action buttons */}
           <div className="flex items-center justify-end gap-2 pt-2">
             <Button variant="ghost" onClick={handleCancel}>
-              Cancel
+              {t('addAccountDialog.cancel')}
             </Button>
             {isKiro && !showAuthUI && (
               <Button variant="outline" onClick={handleKiroImport} disabled={isPending}>
                 {kiroImportMutation.isPending ? (
                   <>
                     <Loader2 className="w-4 h-4 mr-2 animate-spin" />
-                    Importing...
+                    {t('addAccountDialog.importing')}
                   </>
                 ) : (
                   <>
                     <Download className="w-4 h-4 mr-2" />
-                    Import from IDE
+                    {t('addAccountDialog.importFromIde')}
                   </>
                 )}
               </Button>
@@ -560,7 +560,7 @@ export function AddAccountDialog({
                 }
               >
                 <ExternalLink className="w-4 h-4 mr-2" />
-                Authenticate
+                {t('addAccountDialog.authenticate')}
               </Button>
             )}
           </div>

ui/src/components/account/antigravity-responsibility-checklist.tsx

@@ -5,6 +5,7 @@ import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Progress } from '@/components/ui/progress';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 import { ANTIGRAVITY_ACK_PHRASE } from '@/components/account/antigravity-responsibility-constants';
 import type { AntigravityRiskChecklistValue } from '@/components/account/antigravity-responsibility-constants';
 
@@ -21,6 +22,7 @@ export function AntigravityResponsibilityChecklist({
   onChange,
   disabled = false,
 }: AntigravityResponsibilityChecklistProps) {
+  const { t } = useTranslation();
   const completedSteps = [
     value.reviewedIssue509,
     value.understandsBanRisk,
@@ -50,21 +52,19 @@ export function AntigravityResponsibilityChecklist({
               <AlertTriangle className="h-4 w-4" />
             </div>
             <div className="space-y-1">
-              <p className="text-sm font-semibold leading-5">Antigravity OAuth Responsibility</p>
-              <p className="text-xs text-muted-foreground">
-                Complete all 4 steps before you can authenticate.
-              </p>
+              <p className="text-sm font-semibold leading-5">{t('antigravityChecklist.title')}</p>
+              <p className="text-xs text-muted-foreground">{t('antigravityChecklist.subtitle')}</p>
             </div>
           </div>
           <Badge variant="outline" className="border-rose-500/40 text-rose-700 dark:text-rose-300">
-            Mandatory
+            {t('antigravityChecklist.mandatory')}
           </Badge>
         </div>
 
         <div className="space-y-1.5">
           <div className="flex items-center justify-between text-xs text-muted-foreground">
-            <span>Completion</span>
-            <span>{completedSteps}/4 steps</span>
+            <span>{t('antigravityChecklist.completion')}</span>
+            <span>{t('antigravityChecklist.stepsCount', { current: completedSteps })}</span>
           </div>
           <Progress value={progressValue} className="h-2" />
         </div>

ui/src/components/account/create-auth-profile-dialog.tsx

@@ -16,6 +16,7 @@ import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Checkbox } from '@/components/ui/checkbox';
 import { Copy, Check, Terminal } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface CreateAuthProfileDialogProps {
   open: boolean;
@@ -25,6 +26,7 @@ interface CreateAuthProfileDialogProps {
 const MAX_CONTEXT_GROUP_LENGTH = 64;
 
 export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDialogProps) {
+  const { t } = useTranslation();
   const [profileName, setProfileName] = useState('');
   const [shareContext, setShareContext] = useState(false);
   const [contextGroup, setContextGroup] = useState('');
@@ -52,7 +54,7 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
         ]
           .filter(Boolean)
           .join(' ')
-      : 'ccs auth create <name>';
+      : t('createAuthProfileDialog.commandFallback');
 
   const handleCopy = async () => {
     if (!isValidName || (shareContext && !isValidContextGroup)) return;
@@ -74,27 +76,23 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
     <Dialog open={open} onOpenChange={(isOpen) => !isOpen && handleClose()}>
       <DialogContent className="sm:max-w-md">
         <DialogHeader>
-          <DialogTitle>Create New Account</DialogTitle>
-          <DialogDescription>
-            Auth profiles require Claude CLI login. Run the command below in your terminal. You can
-            edit sync mode, group, and continuity depth later from the Accounts table.
-          </DialogDescription>
+          <DialogTitle>{t('createAuthProfileDialog.title')}</DialogTitle>
+          <DialogDescription>{t('createAuthProfileDialog.description')}</DialogDescription>
         </DialogHeader>
 
         <div className="space-y-4 py-4">
           <div className="space-y-2">
-            <Label htmlFor="profile-name">Profile Name</Label>
+            <Label htmlFor="profile-name">{t('createAuthProfileDialog.profileName')}</Label>
             <Input
               id="profile-name"
               value={profileName}
               onChange={(e) => setProfileName(e.target.value)}
-              placeholder="e.g., work, personal, client"
+              placeholder={t('createAuthProfileDialog.profileNamePlaceholder')}
               autoComplete="off"
             />
             {profileName && !isValidName && (
               <p className="text-xs text-destructive">
-                Name must start with a letter and contain only letters, numbers, dashes, or
-                underscores.
+                {t('createAuthProfileDialog.invalidProfileName')}
               </p>
             )}
           </div>
@@ -107,22 +105,24 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
                 onCheckedChange={(checked) => setShareContext(checked === true)}
               />
               <Label htmlFor="share-context" className="cursor-pointer">
-                Enable shared history sync with other ccs auth accounts
+                {t('createAuthProfileDialog.enableSharedHistory')}
               </Label>
             </div>
 
             {shareContext && (
               <div className="space-y-2 pl-6">
-                <Label htmlFor="context-group">History Sync Group (optional)</Label>
+                <Label htmlFor="context-group">
+                  {t('createAuthProfileDialog.historySyncGroupOptional')}
+                </Label>
                 <Input
                   id="context-group"
                   value={contextGroup}
                   onChange={(e) => setContextGroup(e.target.value)}
-                  placeholder="default, sprint-a, client-x"
+                  placeholder={t('createAuthProfileDialog.historySyncGroupPlaceholder')}
                   autoComplete="off"
                 />
                 <p className="text-xs text-muted-foreground">
-                  Leave empty to use the default shared group. Spaces are normalized to dashes.
+                  {t('createAuthProfileDialog.historySyncGroupHint')}
                 </p>
                 <div className="flex items-center gap-2 pt-1">
                   <Checkbox
@@ -131,17 +131,17 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
                     onCheckedChange={(checked) => setDeeperContinuity(checked === true)}
                   />
                   <Label htmlFor="deeper-continuity" className="cursor-pointer">
-                    Advanced: deeper continuity mode
+                    {t('createAuthProfileDialog.deeperContinuity')}
                   </Label>
                 </div>
                 <p className="text-xs text-muted-foreground">
-                  Adds sync for <code>session-env</code>, <code>file-history</code>,{' '}
-                  <code>shell-snapshots</code>, and <code>todos</code>. Credentials stay isolated.
+                  {t('createAuthProfileDialog.deeperContinuityHint')}
                 </p>
                 {contextGroup.trim().length > 0 && !isValidContextGroup && (
                   <p className="text-xs text-destructive">
-                    Group must start with a letter and use only letters, numbers, dashes, or
-                    underscores (max {MAX_CONTEXT_GROUP_LENGTH} chars).
+                    {t('createAuthProfileDialog.invalidContextGroup', {
+                      max: MAX_CONTEXT_GROUP_LENGTH,
+                    })}
                   </p>
                 )}
               </div>
@@ -149,7 +149,7 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
           </div>
 
           <div className="space-y-2">
-            <Label>Command</Label>
+            <Label>{t('createAuthProfileDialog.command')}</Label>
             <div className="flex items-center gap-2 p-3 bg-muted rounded-md font-mono text-sm">
               <Terminal className="w-4 h-4 text-muted-foreground shrink-0" />
               <code className="flex-1 break-all">{command}</code>
@@ -170,20 +170,17 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
           </div>
 
           <div className="text-sm text-muted-foreground space-y-1">
-            <p>After running the command:</p>
+            <p>{t('createAuthProfileDialog.afterRunPrefix')}</p>
             <ol className="list-decimal list-inside pl-2 space-y-0.5">
-              <li>Complete the Claude login in your browser</li>
-              <li>Return here and refresh to see the new account</li>
+              <li>{t('createAuthProfileDialog.afterRunStep1')}</li>
+              <li>{t('createAuthProfileDialog.afterRunStep2')}</li>
             </ol>
-            <p className="pt-1">
-              Prefer pooled Claude OAuth routing instead? Use CLIProxy Claude pool from the Accounts
-              page action button.
-            </p>
+            <p className="pt-1">{t('createAuthProfileDialog.poolingHint')}</p>
           </div>
 
           <div className="flex justify-end gap-2 pt-2">
             <Button variant="ghost" onClick={handleClose}>
-              Close
+              {t('createAuthProfileDialog.close')}
             </Button>
             <Button
               onClick={handleCopy}
@@ -192,12 +189,12 @@ export function CreateAuthProfileDialog({ open, onClose }: CreateAuthProfileDial
               {copied ? (
                 <>
                   <Check className="w-4 h-4 mr-2" />
-                  Copied!
+                  {t('createAuthProfileDialog.copied')}
                 </>
               ) : (
                 <>
                   <Copy className="w-4 h-4 mr-2" />
-                  Copy Command
+                  {t('createAuthProfileDialog.copyCommand')}
                 </>
               )}
             </Button>

ui/src/components/account/edit-account-context-dialog.tsx

@@ -17,6 +17,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select';
+import { useTranslation } from 'react-i18next';
 import type { Account } from '@/lib/api-client';
 import { useUpdateAccountContext } from '@/hooks/use-accounts';
 
@@ -32,6 +33,7 @@ interface EditAccountContextDialogProps {
 }
 
 export function EditAccountContextDialog({ account, onClose }: EditAccountContextDialogProps) {
+  const { t } = useTranslation();
   const updateContextMutation = useUpdateAccountContext();
   const [mode, setMode] = useState<ContextMode>(
     account.context_mode === 'shared' ? 'shared' : 'isolated'
@@ -78,89 +80,86 @@ export function EditAccountContextDialog({ account, onClose }: EditAccountContex
     <Dialog open onOpenChange={handleOpenChange}>
       <DialogContent className="sm:max-w-md">
         <DialogHeader>
-          <DialogTitle>Edit History Sync</DialogTitle>
+          <DialogTitle>{t('editAccountContext.title')}</DialogTitle>
           <DialogDescription>
-            Configure how "{account.name}" shares history and continuity with other
-            <code className="mx-1 rounded bg-muted px-1 py-0.5">ccs auth</code>
-            accounts.
+            {t('editAccountContext.description', { name: account.name })}
           </DialogDescription>
         </DialogHeader>
 
         <div className="space-y-4 py-2">
           <div className="space-y-2">
-            <Label htmlFor="context-mode">Sync Mode</Label>
+            <Label htmlFor="context-mode">{t('editAccountContext.syncMode')}</Label>
             <Select value={mode} onValueChange={(value) => setMode(value as ContextMode)}>
               <SelectTrigger id="context-mode">
-                <SelectValue placeholder="Select context mode" />
+                <SelectValue placeholder={t('editAccountContext.selectContextMode')} />
               </SelectTrigger>
               <SelectContent>
-                <SelectItem value="isolated">isolated (no sync)</SelectItem>
-                <SelectItem value="shared">shared (sync enabled)</SelectItem>
+                <SelectItem value="isolated">{t('editAccountContext.isolatedOption')}</SelectItem>
+                <SelectItem value="shared">{t('editAccountContext.sharedOption')}</SelectItem>
               </SelectContent>
             </Select>
             <p className="text-xs text-muted-foreground">
               {mode === 'shared'
-                ? 'Shared mode reuses workspace context for accounts in the same history sync group.'
-                : 'Isolated mode keeps this account fully separate from other ccs auth accounts.'}
+                ? t('editAccountContext.sharedModeHint')
+                : t('editAccountContext.isolatedModeHint')}
             </p>
           </div>
 
           {mode === 'shared' && (
             <div className="space-y-2">
-              <Label htmlFor="context-group">History Sync Group</Label>
+              <Label htmlFor="context-group">{t('editAccountContext.historySyncGroup')}</Label>
               <Input
                 id="context-group"
                 value={group}
                 onChange={(event) => setGroup(event.target.value)}
-                placeholder="default"
+                placeholder={t('editAccountContext.groupPlaceholder')}
                 autoComplete="off"
               />
               <p className="text-xs text-muted-foreground">
-                Normalized to lowercase (spaces become dashes). Allowed: letters, numbers, `_`, `-`
-                (max {MAX_CONTEXT_GROUP_LENGTH} chars).
+                {t('editAccountContext.groupHint', { max: MAX_CONTEXT_GROUP_LENGTH })}
               </p>
               {!isSharedGroupValid && (
-                <p className="text-xs text-destructive">
-                  Enter a valid group name that starts with a letter.
-                </p>
+                <p className="text-xs text-destructive">{t('editAccountContext.invalidGroup')}</p>
               )}
             </div>
           )}
 
           {mode === 'shared' && (
             <div className="space-y-2">
-              <Label htmlFor="continuity-mode">Continuity Depth</Label>
+              <Label htmlFor="continuity-mode">{t('editAccountContext.continuityDepth')}</Label>
               <Select
                 value={continuityMode}
                 onValueChange={(value) => setContinuityMode(value as ContinuityMode)}
               >
                 <SelectTrigger id="continuity-mode">
-                  <SelectValue placeholder="Select continuity depth" />
+                  <SelectValue placeholder={t('editAccountContext.selectContinuityDepth')} />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="standard">standard (projects only)</SelectItem>
-                  <SelectItem value="deeper">deeper continuity (advanced)</SelectItem>
+                  <SelectItem value="standard">{t('editAccountContext.standardOption')}</SelectItem>
+                  <SelectItem value="deeper">{t('editAccountContext.deeperOption')}</SelectItem>
                 </SelectContent>
               </Select>
               <p className="text-xs text-muted-foreground">
                 {continuityMode === 'deeper'
-                  ? 'Advanced mode also syncs session-env, file-history, shell-snapshots, and todos.'
-                  : 'Standard mode syncs project workspace context only.'}
+                  ? t('editAccountContext.deeperHint')
+                  : t('editAccountContext.standardHint')}
               </p>
             </div>
           )}
 
           <p className="text-xs text-muted-foreground">
-            Credentials and `.anthropic` remain isolated per account in all modes.
+            {t('editAccountContext.credentialsIsolated')}
           </p>
         </div>
 
         <DialogFooter>
           <Button variant="outline" onClick={onClose} disabled={updateContextMutation.isPending}>
-            Cancel
+            {t('editAccountContext.cancel')}
           </Button>
           <Button onClick={handleSave} disabled={!canSubmit || updateContextMutation.isPending}>
-            {updateContextMutation.isPending ? 'Saving...' : 'Save'}
+            {updateContextMutation.isPending
+              ? t('editAccountContext.saving')
+              : t('editAccountContext.save')}
           </Button>
         </DialogFooter>
       </DialogContent>

ui/src/components/account/flow-viz/account-card.tsx

@@ -17,6 +17,7 @@ import { useAccountQuota, QUOTA_SUPPORTED_PROVIDERS } from '@/hooks/use-cliproxy
 import type { QuotaSupportedProvider } from '@/hooks/use-cliproxy-stats';
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
 import { Button } from '@/components/ui/button';
+import { useTranslation } from 'react-i18next';
 import { QuotaTooltipContent } from '@/components/shared/quota-tooltip-content';
 
 import type { AccountData, DragOffset } from './types';
@@ -94,6 +95,7 @@ export function AccountCard({
   onPauseToggle,
   isPausingAccount,
 }: AccountCardProps) {
+  const { t } = useTranslation();
   const borderSide = BORDER_SIDE_MAP[zone];
   const borderColor = getBorderColorStyle(zone, account.color);
   const connectorPosition = CONNECTOR_POSITION_MAP[zone];
@@ -245,7 +247,7 @@ export function AccountCard({
                 </Button>
               </TooltipTrigger>
               <TooltipContent side="top" className="text-xs">
-                {account.paused ? 'Resume account' : 'Pause account'}
+                {account.paused ? t('accountCard.resumeAccount') : t('accountCard.pauseAccount')}
               </TooltipContent>
             </Tooltip>
           </TooltipProvider>
@@ -266,7 +268,7 @@ export function AccountCard({
           {quotaLoading ? (
             <div className="flex items-center gap-1 text-[8px] text-muted-foreground">
               <Loader2 className="w-2.5 h-2.5 animate-spin" />
-              <span>Quota...</span>
+              <span>{t('accountCard.quotaLoading')}</span>
             </div>
           ) : minQuotaValue !== null ? (
             <TooltipProvider>
@@ -275,7 +277,7 @@ export function AccountCard({
                   <div className="space-y-0.5 cursor-help">
                     <div className="flex items-center justify-between">
                       <span className="text-[8px] text-muted-foreground/70 uppercase font-bold tracking-tight">
-                        Quota
+                        {t('accountCard.quota')}
                       </span>
                       <span
                         className={cn(
@@ -320,21 +322,23 @@ export function AccountCard({
               </Tooltip>
             </TooltipProvider>
           ) : quota?.success ? (
-            <div className="text-[8px] text-muted-foreground/60">Quota limits unavailable</div>
+            <div className="text-[8px] text-muted-foreground/60">
+              {t('accountCard.quotaUnavailable')}
+            </div>
           ) : quota?.needsReauth ? (
             <TooltipProvider>
               <Tooltip>
                 <TooltipTrigger asChild>
                   <div className="flex items-center gap-1 text-[8px] text-amber-600 dark:text-amber-400">
                     <KeyRound className="w-2.5 h-2.5" />
-                    <span>Reauth needed</span>
+                    <span>{t('accountCard.reauthNeeded')}</span>
                   </div>
                 </TooltipTrigger>
                 <TooltipContent side="top" className="max-w-[200px]">
                   <p className="text-xs">
                     {quota.error?.includes('No refresh token')
-                      ? 'Remove and re-add account'
-                      : quota.error || 'Auto-refresh failed'}
+                      ? t('accountCard.removeAndReadd')
+                      : quota.error || t('accountCard.autoRefreshFailed')}
                   </p>
                 </TooltipContent>
               </Tooltip>

ui/src/components/account/flow-viz/connection-timeline.tsx

@@ -2,6 +2,7 @@
  * Connection Timeline Component - right sidebar panel
  */
 
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import { STATUS_COLORS } from '@/lib/utils';
 import { PRIVACY_BLUR_CLASS } from '@/contexts/privacy-context';
@@ -16,10 +17,13 @@ interface ConnectionTimelineProps {
 }
 
 export function ConnectionTimeline({ events, privacyMode }: ConnectionTimelineProps) {
+  const { t } = useTranslation();
   if (events.length === 0) {
     return (
       <div className="h-full flex items-center justify-center rounded-xl bg-muted/20 dark:bg-zinc-900/40 border border-border/30 dark:border-white/[0.05]">
-        <div className="text-xs text-muted-foreground font-mono">No recent connections</div>
+        <div className="text-xs text-muted-foreground font-mono">
+          {t('flowViz.noRecentConnections')}
+        </div>
       </div>
     );
   }
@@ -30,7 +34,7 @@ export function ConnectionTimeline({ events, privacyMode }: ConnectionTimelinePr
       <div className="flex items-center gap-2 mb-3 px-2">
         <Activity className="w-3.5 h-3.5 text-muted-foreground" />
         <span className="text-[10px] text-muted-foreground font-medium uppercase tracking-wider">
-          Connection Timeline
+          {t('flowViz.connectionTimeline')}
         </span>
       </div>
 

ui/src/components/account/flow-viz/flow-viz-header.tsx

@@ -2,6 +2,7 @@
  * Flow Visualization Header Component
  */
 
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import { ChevronRight, Eye, EyeOff, RotateCcw } from 'lucide-react';
 
@@ -20,6 +21,7 @@ export function FlowVizHeader({
   hasCustomPositions,
   onResetPositions,
 }: FlowVizHeaderProps) {
+  const { t } = useTranslation();
   return (
     <div className="flex items-center justify-between px-3 py-1.5">
       {onBack ? (
@@ -28,7 +30,7 @@ export function FlowVizHeader({
           className="group flex items-center gap-1.5 text-xs font-medium text-muted-foreground hover:text-foreground transition-all duration-200 px-3 py-1.5 rounded-md hover:bg-muted/50 border border-transparent hover:border-border/50"
         >
           <ChevronRight className="w-3.5 h-3.5 rotate-180 transition-transform group-hover:-translate-x-0.5" />
-          <span>Back to providers</span>
+          <span>{t('flowViz.backToProviders')}</span>
         </button>
       ) : (
         <div />
@@ -44,7 +46,7 @@ export function FlowVizHeader({
           )}
         >
           {showDetails ? <EyeOff className="w-3.5 h-3.5" /> : <Eye className="w-3.5 h-3.5" />}
-          <span>{showDetails ? 'Hide Details' : 'Show Details'}</span>
+          <span>{showDetails ? t('flowViz.hideDetails') : t('flowViz.showDetails')}</span>
         </button>
         {hasCustomPositions && (
           <button
@@ -52,7 +54,7 @@ export function FlowVizHeader({
             className="flex items-center gap-1.5 text-xs font-medium text-muted-foreground hover:text-foreground transition-all duration-200 px-3 py-1.5 rounded-md border border-border/60 hover:border-border bg-background hover:bg-muted/50 shadow-sm"
           >
             <RotateCcw className="w-3.5 h-3.5" />
-            <span>Reset layout</span>
+            <span>{t('flowViz.resetLayout')}</span>
           </button>
         )}
       </div>

ui/src/components/account/flow-viz/provider-card.tsx

@@ -2,6 +2,7 @@
  * Provider Card Component for Flow Visualization
  */
 
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import { ProviderIcon } from '@/components/shared/provider-icon';
 import { GripVertical } from 'lucide-react';
@@ -39,6 +40,7 @@ export function ProviderCard({
   onPointerMove,
   onPointerUp,
 }: ProviderCardProps) {
+  const { t } = useTranslation();
   const { accounts } = providerData;
 
   return (
@@ -115,17 +117,19 @@ export function ProviderCard({
           <h3 className="text-sm font-semibold text-foreground tracking-tight">
             {providerData.displayName}
           </h3>
-          <p className="text-[10px] text-muted-foreground font-medium uppercase">Provider</p>
+          <p className="text-[10px] text-muted-foreground font-medium uppercase">
+            {t('flowViz.provider')}
+          </p>
         </div>
       </div>
 
       <div className="space-y-2 relative z-10">
         <div className="flex justify-between items-center text-xs">
-          <span className="text-muted-foreground">Total Requests</span>
+          <span className="text-muted-foreground">{t('flowViz.totalRequests')}</span>
           <span className="text-foreground font-mono">{totalRequests.toLocaleString()}</span>
         </div>
         <div className="flex justify-between items-center text-xs">
-          <span className="text-muted-foreground">Accounts</span>
+          <span className="text-muted-foreground">{t('flowViz.accounts')}</span>
           <span className="text-foreground font-mono">{accounts.length}</span>
         </div>
         <div className="w-full bg-muted dark:bg-zinc-800/50 h-1 rounded-full mt-2 overflow-hidden">

ui/src/components/account/history-sync-learning-map.tsx

@@ -13,6 +13,7 @@ import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/components/ui/collapsible';
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 
 interface HistorySyncLearningMapProps {
@@ -76,6 +77,7 @@ export function HistorySyncLearningMap({
   legacyTargetCount,
   cliproxyCount,
 }: HistorySyncLearningMapProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const groupsToShow = sharedGroups.length > 0 ? sharedGroups : ['default'];
 
@@ -84,33 +86,47 @@ export function HistorySyncLearningMap({
       <CardHeader className="pb-2">
         <div className="flex items-center justify-between gap-2">
           <div>
-            <CardTitle className="text-base">How History Sync Works</CardTitle>
+            <CardTitle className="text-base">{t('historySyncLearningMap.title')}</CardTitle>
             <CardDescription className="mt-1">
-              Isolated -&gt; Shared -&gt; Deeper. Use <code>Sync</code> per row for all changes.
+              {t('historySyncLearningMap.description')}
             </CardDescription>
           </div>
-          <Badge variant="outline">Learning Map</Badge>
+          <Badge variant="outline">{t('historySyncLearningMap.learningMap')}</Badge>
         </div>
       </CardHeader>
 
       <CardContent className="space-y-3">
         {cliproxyCount > 0 && (
           <div className="rounded-md border border-blue-300/60 bg-blue-50/40 px-3 py-2 text-xs text-blue-800 dark:border-blue-900/40 dark:bg-blue-900/10 dark:text-blue-300">
-            {cliproxyCount} CLIProxy Claude pool account{cliproxyCount > 1 ? 's are' : ' is'}
-            managed in Action Center / CLIProxy page.
+            {t('historySyncLearningMap.cliproxyManaged', { count: cliproxyCount })}
           </div>
         )}
 
         <div className="grid gap-2 sm:grid-cols-[1fr_auto_1fr_auto_1fr] sm:items-center">
-          <StageTile title="Isolated" count={isolatedCount} icon={Unlink} tone="isolated" />
+          <StageTile
+            title={t('historySyncLearningMap.isolated')}
+            count={isolatedCount}
+            icon={Unlink}
+            tone="isolated"
+          />
           <div className="hidden sm:flex justify-center text-muted-foreground">
             <ArrowRight className="h-4 w-4" />
           </div>
-          <StageTile title="Shared" count={sharedStandardCount} icon={Link2} tone="shared" />
+          <StageTile
+            title={t('historySyncLearningMap.shared')}
+            count={sharedStandardCount}
+            icon={Link2}
+            tone="shared"
+          />
           <div className="hidden sm:flex justify-center text-muted-foreground">
             <ArrowRight className="h-4 w-4" />
           </div>
-          <StageTile title="Deeper" count={deeperSharedCount} icon={Waves} tone="deeper" />
+          <StageTile
+            title={t('historySyncLearningMap.deeper')}
+            count={deeperSharedCount}
+            icon={Waves}
+            tone="deeper"
+          />
         </div>
 
         <Collapsible open={open} onOpenChange={setOpen}>
@@ -119,7 +135,7 @@ export function HistorySyncLearningMap({
               variant="ghost"
               className="h-8 w-full justify-between rounded-md px-2 text-xs text-muted-foreground hover:bg-muted/40 hover:text-foreground"
             >
-              <span>Show details: groups, switching, and legacy policy</span>
+              <span>{t('historySyncLearningMap.showDetails')}</span>
               <ChevronDown className={cn('h-4 w-4 transition-transform', open && 'rotate-180')} />
             </Button>
           </CollapsibleTrigger>
@@ -128,21 +144,20 @@ export function HistorySyncLearningMap({
               <div className="rounded-md border bg-muted/20 p-2.5 text-xs">
                 <div className="flex items-center gap-2">
                   <ArrowRightLeft className="h-3.5 w-3.5 text-muted-foreground" />
-                  <p className="font-semibold">Mode Switch</p>
+                  <p className="font-semibold">{t('historySyncLearningMap.modeSwitch')}</p>
                 </div>
                 <p className="mt-1 text-muted-foreground">
-                  Sync dialog lets users move between isolated/shared and choose deeper continuity.
+                  {t('historySyncLearningMap.modeSwitchDesc')}
                 </p>
               </div>
 
               <div className="rounded-md border bg-muted/20 p-2.5 text-xs">
                 <div className="flex items-center gap-2">
                   <Layers3 className="h-3.5 w-3.5 text-muted-foreground" />
-                  <p className="font-semibold">History Sync Group</p>
+                  <p className="font-semibold">{t('historySyncLearningMap.historySyncGroup')}</p>
                 </div>
                 <p className="mt-1 text-muted-foreground">
-                  Same group means shared project context lane. Default fallback is{' '}
-                  <code>default</code>.
+                  {t('historySyncLearningMap.historySyncGroupDesc')}
                 </p>
                 <div className="mt-2 flex flex-wrap gap-1.5">
                   {groupsToShow.map((group) => (

ui/src/components/analytics/usage-summary-cards.tsx

@@ -12,6 +12,7 @@ import { DollarSign, Database, FileText, ArrowDownRight, ArrowUpRight } from 'lu
 import { cn } from '@/lib/utils';
 import type { UsageSummary } from '@/hooks/use-usage';
 import { usePrivacy, PRIVACY_BLUR_CLASS } from '@/contexts/privacy-context';
+import { useTranslation } from 'react-i18next';
 
 interface UsageSummaryCardsProps {
   data?: UsageSummary;
@@ -20,6 +21,7 @@ interface UsageSummaryCardsProps {
 
 export function UsageSummaryCards({ data, isLoading }: UsageSummaryCardsProps) {
   const { privacyMode } = usePrivacy();
+  const { t } = useTranslation();
 
   if (isLoading) {
     return (
@@ -48,49 +50,61 @@ export function UsageSummaryCards({ data, isLoading }: UsageSummaryCardsProps) {
 
   const cards = [
     {
-      title: 'Total Tokens',
+      title: t('analyticsSummary.totalTokens'),
       value: data?.totalTokens ?? 0,
       icon: FileText,
       format: (v: number) => formatNumber(v),
       color: 'text-blue-600',
       bgColor: 'bg-blue-100 dark:bg-blue-900/20',
-      subtitle: `${formatNumber(data?.totalInputTokens ?? 0)} in / ${formatNumber(data?.totalOutputTokens ?? 0)} out`,
+      subtitle: t('analyticsSummary.totalTokensSubtitle', {
+        input: formatNumber(data?.totalInputTokens ?? 0),
+        output: formatNumber(data?.totalOutputTokens ?? 0),
+      }),
     },
     {
-      title: 'Total Cost',
+      title: t('analyticsSummary.totalCost'),
       value: data?.totalCost ?? 0,
       icon: DollarSign,
       format: (v: number) => `$${v.toFixed(2)}`,
       color: 'text-green-600',
       bgColor: 'bg-green-100 dark:bg-green-900/20',
-      subtitle: `$${data?.averageCostPerDay?.toFixed(2) ?? '0.00'}/day avg`,
+      subtitle: t('analyticsSummary.totalCostSubtitle', {
+        value: data?.averageCostPerDay?.toFixed(2) ?? '0.00',
+      }),
     },
     {
-      title: 'Cache Tokens',
+      title: t('analyticsSummary.cacheTokens'),
       value: data?.totalCacheTokens ?? 0,
       icon: Database,
       format: (v: number) => formatNumber(v),
       color: 'text-cyan-600',
       bgColor: 'bg-cyan-100 dark:bg-cyan-900/20',
-      subtitle: `$${cacheCost.toFixed(2)} (${cacheCostPercent}% of cost)`,
+      subtitle: t('analyticsSummary.cacheTokensSubtitle', {
+        cost: cacheCost.toFixed(2),
+        percent: cacheCostPercent,
+      }),
     },
     {
-      title: 'Input Cost',
+      title: t('analyticsSummary.inputCost'),
       value: data?.tokenBreakdown?.input?.cost ?? 0,
       icon: ArrowDownRight,
       format: (v: number) => `$${v.toFixed(2)}`,
       color: 'text-purple-600',
       bgColor: 'bg-purple-100 dark:bg-purple-900/20',
-      subtitle: `${formatNumber(data?.tokenBreakdown?.input?.tokens ?? 0)} tokens`,
+      subtitle: t('analyticsSummary.tokensSubtitle', {
+        value: formatNumber(data?.tokenBreakdown?.input?.tokens ?? 0),
+      }),
     },
     {
-      title: 'Output Cost',
+      title: t('analyticsSummary.outputCost'),
       value: data?.tokenBreakdown?.output?.cost ?? 0,
       icon: ArrowUpRight,
       format: (v: number) => `$${v.toFixed(2)}`,
       color: 'text-orange-600',
       bgColor: 'bg-orange-100 dark:bg-orange-900/20',
-      subtitle: `${formatNumber(data?.tokenBreakdown?.output?.tokens ?? 0)} tokens`,
+      subtitle: t('analyticsSummary.tokensSubtitle', {
+        value: formatNumber(data?.tokenBreakdown?.output?.tokens ?? 0),
+      }),
     },
   ];
 

ui/src/components/cliproxy/categorized-model-selector.tsx

@@ -18,21 +18,22 @@ import { Skeleton } from '@/components/ui/skeleton';
 import { Cpu } from 'lucide-react';
 import type { CliproxyModelsResponse } from '@/lib/api-client';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 /** Provider display configuration */
-const CATEGORY_CONFIG: Record<string, { name: string; color: string }> = {
-  google: { name: 'Google (Gemini)', color: 'text-blue-600' },
-  openai: { name: 'OpenAI (GPT)', color: 'text-green-600' },
-  anthropic: { name: 'Anthropic (Claude)', color: 'text-orange-600' },
-  antigravity: { name: 'Antigravity', color: 'text-purple-600' },
-  other: { name: 'Other', color: 'text-gray-600' },
+const CATEGORY_CONFIG: Record<string, { key: string; color: string }> = {
+  google: { key: 'google', color: 'text-blue-600' },
+  openai: { key: 'openai', color: 'text-green-600' },
+  anthropic: { key: 'anthropic', color: 'text-orange-600' },
+  antigravity: { key: 'antigravity', color: 'text-purple-600' },
+  other: { key: 'other', color: 'text-gray-600' },
 };
 
 /** Get display name for category */
 function getCategoryDisplay(category: string) {
   return (
     CATEGORY_CONFIG[category.toLowerCase()] || {
-      name: category.charAt(0).toUpperCase() + category.slice(1),
+      key: 'other',
       color: 'text-gray-600',
     }
   );
@@ -61,9 +62,12 @@ export function CategorizedModelSelector({
   value,
   onChange,
   disabled,
-  placeholder = 'Select a model',
+  placeholder,
   className,
 }: CategorizedModelSelectorProps) {
+  const { t } = useTranslation();
+  const resolvedPlaceholder = placeholder ?? t('categorizedModelSelector.selectModel');
+
   // Sort categories by model count (descending)
   const sortedCategories = useMemo(() => {
     if (!modelsData?.byCategory) return [];
@@ -84,7 +88,7 @@ export function CategorizedModelSelector({
     return (
       <div className={cn('flex items-center gap-2 text-sm text-muted-foreground', className)}>
         <Cpu className="w-4 h-4" />
-        <span>No models available</span>
+        <span>{t('categorizedModelSelector.noModelsAvailable')}</span>
       </div>
     );
   }
@@ -92,7 +96,7 @@ export function CategorizedModelSelector({
   return (
     <Select value={value || ''} onValueChange={onChange} disabled={disabled}>
       <SelectTrigger className={cn('w-[320px]', className)}>
-        <SelectValue placeholder={placeholder}>
+        <SelectValue placeholder={resolvedPlaceholder}>
           {value && (
             <div className="flex items-center gap-2">
               <span className="truncate">{value}</span>
@@ -104,7 +108,9 @@ export function CategorizedModelSelector({
         {sortedCategories.map(({ category, display, models }) => (
           <SelectGroup key={category}>
             <SelectLabel className="flex items-center justify-between px-2 py-1.5">
-              <span className={cn('font-semibold', display.color)}>{display.name}</span>
+              <span className={cn('font-semibold', display.color)}>
+                {t(`cliproxyModelCategory.${display.key}`)}
+              </span>
               <Badge variant="secondary" className="text-[10px] h-4 px-1.5 ml-2">
                 {models.length}
               </Badge>
@@ -129,6 +135,8 @@ export function CategorizedModelSelectorCompact({
   onChange,
   disabled,
 }: Omit<CategorizedModelSelectorProps, 'placeholder' | 'className'>) {
+  const { t } = useTranslation();
+
   return (
     <CategorizedModelSelector
       modelsData={modelsData}
@@ -136,7 +144,7 @@ export function CategorizedModelSelectorCompact({
       value={value}
       onChange={onChange}
       disabled={disabled}
-      placeholder="Model..."
+      placeholder={t('categorizedModelSelector.modelPlaceholder')}
       className="w-[200px]"
     />
   );

ui/src/components/cliproxy/cliproxy-dialog.tsx

@@ -14,6 +14,7 @@ import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/components/ui/tabs';
+import { useTranslation } from 'react-i18next';
 import { useCreateVariant, useCliproxyAuth } from '@/hooks/use-cliproxy';
 import { usePrivacy } from '@/contexts/privacy-context';
 import { CLIPROXY_PROVIDERS, getProviderDisplayName } from '@/lib/provider-config';
@@ -69,6 +70,7 @@ const providerOptions = CLIPROXY_PROVIDERS.map((id) => ({
 }));
 
 export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
+  const { t } = useTranslation();
   const createMutation = useCreateVariant();
   const { data: authData } = useCliproxyAuth();
   const { privacyMode } = usePrivacy();
@@ -151,8 +153,12 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
           {mode === 'single' ? (
             <form onSubmit={singleForm.handleSubmit(onSubmitSingle)} className="space-y-4">
               <div>
-                <Label htmlFor="name">Name</Label>
-                <Input id="name" {...singleForm.register('name')} placeholder="my-gemini" />
+                <Label htmlFor="name">{t('cliproxyDialog.name')}</Label>
+                <Input
+                  id="name"
+                  {...singleForm.register('name')}
+                  placeholder={t('cliproxyDialog.placeholderName')}
+                />
                 {singleForm.formState.errors.name && (
                   <span className="text-xs text-red-500">
                     {singleForm.formState.errors.name.message}
@@ -161,13 +167,13 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
               </div>
 
               <div>
-                <Label htmlFor="provider">Provider</Label>
+                <Label htmlFor="provider">{t('cliproxyDialog.provider')}</Label>
                 <select
                   id="provider"
                   {...singleForm.register('provider')}
                   className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                 >
-                  <option value="">Select provider...</option>
+                  <option value="">{t('cliproxyDialog.selectProvider')}</option>
                   {providerOptions.map((opt) => (
                     <option key={opt.value} value={opt.value}>
                       {opt.label}
@@ -183,17 +189,17 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
 
               {selectedProvider && providerAccounts.length > 0 && (
                 <div>
-                  <Label htmlFor="account">Account</Label>
+                  <Label htmlFor="account">{t('cliproxyDialog.account')}</Label>
                   <select
                     id="account"
                     {...singleForm.register('account')}
                     className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                   >
-                    <option value="">Use default account</option>
+                    <option value="">{t('cliproxyDialog.useDefaultAccount')}</option>
                     {providerAccounts.map((acc) => (
                       <option key={acc.id} value={acc.id}>
                         {privacyMode ? '••••••' : acc.email || acc.id}
-                        {acc.isDefault ? ' (default)' : ''}
+                        {acc.isDefault ? ` ${t('cliproxyDialog.defaultSuffix')}` : ''}
                       </option>
                     ))}
                   </select>
@@ -201,39 +207,45 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
               )}
 
               <div>
-                <Label htmlFor="model">Model (optional)</Label>
-                <Input id="model" {...singleForm.register('model')} placeholder="gemini-2.5-pro" />
+                <Label htmlFor="model">{t('cliproxyDialog.modelOptional')}</Label>
+                <Input
+                  id="model"
+                  {...singleForm.register('model')}
+                  placeholder={t('cliproxyDialog.placeholderModel')}
+                />
               </div>
 
               <div>
-                <Label htmlFor="target">Default Target</Label>
+                <Label htmlFor="target">{t('cliproxyDialog.defaultTarget')}</Label>
                 <select
                   id="target"
                   {...singleForm.register('target')}
                   className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                 >
-                  <option value="claude">Claude Code</option>
-                  <option value="droid">Factory Droid</option>
+                  <option value="claude">{t('cliproxyDialog.claudeCode')}</option>
+                  <option value="droid">{t('cliproxyDialog.factoryDroid')}</option>
                 </select>
               </div>
 
               <div className="flex justify-end gap-2 pt-2">
                 <Button type="button" variant="outline" onClick={onClose}>
-                  Cancel
+                  {t('cliproxyDialog.cancel')}
                 </Button>
                 <Button type="submit" disabled={createMutation.isPending}>
-                  {createMutation.isPending ? 'Creating...' : 'Create'}
+                  {createMutation.isPending
+                    ? t('cliproxyDialog.creating')
+                    : t('cliproxyDialog.create')}
                 </Button>
               </div>
             </form>
           ) : (
             <form onSubmit={compositeForm.handleSubmit(onSubmitComposite)} className="space-y-4">
               <div>
-                <Label htmlFor="comp-name">Name</Label>
+                <Label htmlFor="comp-name">{t('cliproxyDialog.name')}</Label>
                 <Input
                   id="comp-name"
                   {...compositeForm.register('name')}
-                  placeholder="my-composite"
+                  placeholder={t('cliproxyDialog.placeholderComposite')}
                 />
                 {compositeForm.formState.errors.name && (
                   <span className="text-xs text-red-500">
@@ -243,17 +255,17 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
               </div>
 
               <div>
-                <Label>Tier Configuration</Label>
+                <Label>{t('cliproxyDialog.tierConfig')}</Label>
                 <Tabs defaultValue="opus" className="w-full">
                   <TabsList className="grid w-full grid-cols-3">
-                    <TabsTrigger value="opus">Opus</TabsTrigger>
-                    <TabsTrigger value="sonnet">Sonnet</TabsTrigger>
-                    <TabsTrigger value="haiku">Haiku</TabsTrigger>
+                    <TabsTrigger value="opus">{t('cliproxyDialog.opus')}</TabsTrigger>
+                    <TabsTrigger value="sonnet">{t('cliproxyDialog.sonnet')}</TabsTrigger>
+                    <TabsTrigger value="haiku">{t('cliproxyDialog.haiku')}</TabsTrigger>
                   </TabsList>
                   {(['opus', 'sonnet', 'haiku'] as const).map((tier) => (
                     <TabsContent key={tier} value={tier} className="space-y-3">
                       <div>
-                        <Label htmlFor={`${tier}-provider`}>Provider</Label>
+                        <Label htmlFor={`${tier}-provider`}>{t('cliproxyDialog.provider')}</Label>
                         <select
                           id={`${tier}-provider`}
                           {...compositeForm.register(`tiers.${tier}.provider`)}
@@ -267,11 +279,11 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
                         </select>
                       </div>
                       <div>
-                        <Label htmlFor={`${tier}-model`}>Model</Label>
+                        <Label htmlFor={`${tier}-model`}>{t('cliproxyDialog.model')}</Label>
                         <Input
                           id={`${tier}-model`}
                           {...compositeForm.register(`tiers.${tier}.model`)}
-                          placeholder="model-id"
+                          placeholder={t('cliproxyDialog.placeholderModelId')}
                         />
                         {compositeForm.formState.errors.tiers?.[tier]?.model && (
                           <span className="text-xs text-red-500">
@@ -280,11 +292,13 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
                         )}
                       </div>
                       <div>
-                        <Label htmlFor={`${tier}-account`}>Account (optional)</Label>
+                        <Label htmlFor={`${tier}-account`}>
+                          {t('cliproxyDialog.accountOptional')}
+                        </Label>
                         <Input
                           id={`${tier}-account`}
                           {...compositeForm.register(`tiers.${tier}.account`)}
-                          placeholder="account-id"
+                          placeholder={t('cliproxyDialog.placeholderAccountId')}
                         />
                       </div>
                     </TabsContent>
@@ -293,36 +307,38 @@ export function CliproxyDialog({ open, onClose }: CliproxyDialogProps) {
               </div>
 
               <div>
-                <Label htmlFor="default-tier">Default Tier</Label>
+                <Label htmlFor="default-tier">{t('cliproxyDialog.defaultTier')}</Label>
                 <select
                   id="default-tier"
                   {...compositeForm.register('default_tier')}
                   className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                 >
-                  <option value="opus">Opus</option>
-                  <option value="sonnet">Sonnet</option>
-                  <option value="haiku">Haiku</option>
+                  <option value="opus">{t('cliproxyDialog.opus')}</option>
+                  <option value="sonnet">{t('cliproxyDialog.sonnet')}</option>
+                  <option value="haiku">{t('cliproxyDialog.haiku')}</option>
                 </select>
               </div>
 
               <div>
-                <Label htmlFor="composite-target">Default Target</Label>
+                <Label htmlFor="composite-target">{t('cliproxyDialog.defaultTarget')}</Label>
                 <select
                   id="composite-target"
                   {...compositeForm.register('target')}
                   className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
                 >
-                  <option value="claude">Claude Code</option>
-                  <option value="droid">Factory Droid</option>
+                  <option value="claude">{t('cliproxyDialog.claudeCode')}</option>
+                  <option value="droid">{t('cliproxyDialog.factoryDroid')}</option>
                 </select>
               </div>
 
               <div className="flex justify-end gap-2 pt-2">
                 <Button type="button" variant="outline" onClick={onClose}>
-                  Cancel
+                  {t('cliproxyDialog.cancel')}
                 </Button>
                 <Button type="submit" disabled={createMutation.isPending}>
-                  {createMutation.isPending ? 'Creating...' : 'Create'}
+                  {createMutation.isPending
+                    ? t('cliproxyDialog.creating')
+                    : t('cliproxyDialog.create')}
                 </Button>
               </div>
             </form>

ui/src/components/cliproxy/cliproxy-edit-dialog.tsx

@@ -12,6 +12,7 @@ import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/components/ui/tabs';
+import { useTranslation } from 'react-i18next';
 import { useUpdateVariant } from '@/hooks/use-cliproxy';
 import { CLIPROXY_PROVIDERS, getProviderDisplayName } from '@/lib/provider-config';
 import type { UpdateVariant, Variant } from '@/lib/api-client';
@@ -117,6 +118,7 @@ function isCompositeVariantOnlyTargetChange(variant: Variant, data: CompositeFor
 }
 
 export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEditDialogProps) {
+  const { t } = useTranslation();
   const updateMutation = useUpdateVariant();
   const isComposite = variant?.type === 'composite';
 
@@ -264,24 +266,28 @@ export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEdit
       <DialogContent className="max-w-2xl max-h-[80vh] overflow-y-auto">
         <DialogHeader>
           <DialogTitle>
-            Edit {isComposite ? 'Composite' : 'Single'} Variant: {variant.name}
+            {isComposite
+              ? t('cliproxyDialog.editCompositeTitle', { name: variant.name })
+              : t('cliproxyDialog.editSingleTitle', { name: variant.name })}
           </DialogTitle>
         </DialogHeader>
 
         {isComposite ? (
           <form onSubmit={compositeForm.handleSubmit(onSubmitComposite)} className="space-y-4">
             <div>
-              <Label>Tier Configuration</Label>
+              <Label>{t('cliproxyDialog.tierConfig')}</Label>
               <Tabs defaultValue="opus" className="w-full">
                 <TabsList className="grid w-full grid-cols-3">
-                  <TabsTrigger value="opus">Opus</TabsTrigger>
-                  <TabsTrigger value="sonnet">Sonnet</TabsTrigger>
-                  <TabsTrigger value="haiku">Haiku</TabsTrigger>
+                  <TabsTrigger value="opus">{t('cliproxyDialog.opus')}</TabsTrigger>
+                  <TabsTrigger value="sonnet">{t('cliproxyDialog.sonnet')}</TabsTrigger>
+                  <TabsTrigger value="haiku">{t('cliproxyDialog.haiku')}</TabsTrigger>
                 </TabsList>
                 {(['opus', 'sonnet', 'haiku'] as const).map((tier) => (
                   <TabsContent key={tier} value={tier} className="space-y-3">
                     <div>
-                      <Label htmlFor={`edit-${tier}-provider`}>Provider</Label>
+                      <Label htmlFor={`edit-${tier}-provider`}>
+                        {t('cliproxyDialog.provider')}
+                      </Label>
                       <select
                         id={`edit-${tier}-provider`}
                         {...compositeForm.register(`tiers.${tier}.provider`)}
@@ -295,11 +301,11 @@ export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEdit
                       </select>
                     </div>
                     <div>
-                      <Label htmlFor={`edit-${tier}-model`}>Model</Label>
+                      <Label htmlFor={`edit-${tier}-model`}>{t('cliproxyDialog.model')}</Label>
                       <Input
                         id={`edit-${tier}-model`}
                         {...compositeForm.register(`tiers.${tier}.model`)}
-                        placeholder="model-id"
+                        placeholder={t('cliproxyDialog.placeholderModelId')}
                       />
                       {compositeForm.formState.errors.tiers?.[tier]?.model && (
                         <span className="text-xs text-red-500">
@@ -308,11 +314,13 @@ export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEdit
                       )}
                     </div>
                     <div>
-                      <Label htmlFor={`edit-${tier}-account`}>Account (optional)</Label>
+                      <Label htmlFor={`edit-${tier}-account`}>
+                        {t('cliproxyDialog.accountOptional')}
+                      </Label>
                       <Input
                         id={`edit-${tier}-account`}
                         {...compositeForm.register(`tiers.${tier}.account`)}
-                        placeholder="account-id"
+                        placeholder={t('cliproxyDialog.placeholderAccountId')}
                       />
                     </div>
                   </TabsContent>
@@ -321,43 +329,45 @@ export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEdit
             </div>
 
             <div>
-              <Label htmlFor="edit-default-tier">Default Tier</Label>
+              <Label htmlFor="edit-default-tier">{t('cliproxyDialog.defaultTier')}</Label>
               <select
                 id="edit-default-tier"
                 {...compositeForm.register('default_tier')}
                 className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
               >
-                <option value="opus">Opus</option>
-                <option value="sonnet">Sonnet</option>
-                <option value="haiku">Haiku</option>
+                <option value="opus">{t('cliproxyDialog.opus')}</option>
+                <option value="sonnet">{t('cliproxyDialog.sonnet')}</option>
+                <option value="haiku">{t('cliproxyDialog.haiku')}</option>
               </select>
             </div>
 
             <div>
-              <Label htmlFor="edit-composite-target">Default Target</Label>
+              <Label htmlFor="edit-composite-target">{t('cliproxyDialog.defaultTarget')}</Label>
               <select
                 id="edit-composite-target"
                 {...compositeForm.register('target')}
                 className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
               >
-                <option value="claude">Claude Code</option>
-                <option value="droid">Factory Droid</option>
+                <option value="claude">{t('cliproxyDialog.claudeCode')}</option>
+                <option value="droid">{t('cliproxyDialog.factoryDroid')}</option>
               </select>
             </div>
 
             <div className="flex justify-end gap-2 pt-2">
               <Button type="button" variant="outline" onClick={() => onOpenChange(false)}>
-                Cancel
+                {t('cliproxyDialog.cancel')}
               </Button>
               <Button type="submit" disabled={updateMutation.isPending}>
-                {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                {updateMutation.isPending
+                  ? t('cliproxyDialog.saving')
+                  : t('cliproxyDialog.saveChanges')}
               </Button>
             </div>
           </form>
         ) : (
           <form onSubmit={singleForm.handleSubmit(onSubmitSingle)} className="space-y-4">
             <div>
-              <Label htmlFor="edit-provider">Provider</Label>
+              <Label htmlFor="edit-provider">{t('cliproxyDialog.provider')}</Label>
               <select
                 id="edit-provider"
                 {...singleForm.register('provider')}
@@ -372,37 +382,43 @@ export function CliproxyEditDialog({ variant, open, onOpenChange }: CliproxyEdit
             </div>
 
             <div>
-              <Label htmlFor="edit-model">Model</Label>
-              <Input id="edit-model" {...singleForm.register('model')} placeholder="model-id" />
-            </div>
-
-            <div>
-              <Label htmlFor="edit-account">Account (optional)</Label>
+              <Label htmlFor="edit-model">{t('cliproxyDialog.model')}</Label>
               <Input
-                id="edit-account"
-                {...singleForm.register('account')}
-                placeholder="account-id"
+                id="edit-model"
+                {...singleForm.register('model')}
+                placeholder={t('cliproxyDialog.placeholderModelId')}
               />
             </div>
 
             <div>
-              <Label htmlFor="edit-target">Default Target</Label>
+              <Label htmlFor="edit-account">{t('cliproxyDialog.accountOptional')}</Label>
+              <Input
+                id="edit-account"
+                {...singleForm.register('account')}
+                placeholder={t('cliproxyDialog.placeholderAccountId')}
+              />
+            </div>
+
+            <div>
+              <Label htmlFor="edit-target">{t('cliproxyDialog.defaultTarget')}</Label>
               <select
                 id="edit-target"
                 {...singleForm.register('target')}
                 className="flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring"
               >
-                <option value="claude">Claude Code</option>
-                <option value="droid">Factory Droid</option>
+                <option value="claude">{t('cliproxyDialog.claudeCode')}</option>
+                <option value="droid">{t('cliproxyDialog.factoryDroid')}</option>
               </select>
             </div>
 
             <div className="flex justify-end gap-2 pt-2">
               <Button type="button" variant="outline" onClick={() => onOpenChange(false)}>
-                Cancel
+                {t('cliproxyDialog.cancel')}
               </Button>
               <Button type="submit" disabled={updateMutation.isPending}>
-                {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                {updateMutation.isPending
+                  ? t('cliproxyDialog.saving')
+                  : t('cliproxyDialog.saveChanges')}
               </Button>
             </div>
           </form>

ui/src/components/cliproxy/overview/credential-health-list.tsx

@@ -11,6 +11,7 @@ import { useCliproxyAuth } from '@/hooks/use-cliproxy';
 import { useCliproxyStats } from '@/hooks/use-cliproxy-stats';
 import { cn } from '@/lib/utils';
 import { usePrivacy, PRIVACY_BLUR_CLASS } from '@/contexts/privacy-context';
+import { useTranslation } from 'react-i18next';
 
 type CredentialStatus = 'ready' | 'warning' | 'error' | 'disabled';
 
@@ -35,6 +36,8 @@ function CredentialRow({
   onRefresh,
   privacyMode,
 }: CredentialRowProps) {
+  const { t } = useTranslation();
+
   const statusConfig = {
     ready: {
       icon: CheckCircle2,
@@ -62,21 +65,21 @@ function CredentialRow({
   const Icon = config.icon;
 
   const formatLastUsed = (date?: string) => {
-    if (!date) return 'Never used';
+    if (!date) return t('credentialHealth.neverUsed');
     try {
       const lastUsed = new Date(date);
       const now = new Date();
       const diff = now.getTime() - lastUsed.getTime();
-      if (diff < 0) return 'Just now';
+      if (diff < 0) return t('credentialHealth.justNow');
       const minutes = Math.floor(diff / 60000);
       const hours = Math.floor(diff / 3600000);
       const days = Math.floor(diff / 86400000);
-      if (days > 0) return `${days}d ago`;
-      if (hours > 0) return `${hours}h ago`;
-      if (minutes > 0) return `${minutes}m ago`;
-      return 'Just now';
+      if (days > 0) return t('credentialHealth.daysAgo', { count: days });
+      if (hours > 0) return t('credentialHealth.hoursAgo', { count: hours });
+      if (minutes > 0) return t('credentialHealth.minutesAgo', { count: minutes });
+      return t('credentialHealth.justNow');
     } catch {
-      return 'Unknown';
+      return t('credentialHealth.unknown');
     }
   };
 
@@ -120,10 +123,12 @@ function CredentialRow({
 }
 
 function CredentialHealthSkeleton() {
+  const { t } = useTranslation();
+
   return (
     <Card>
       <CardHeader>
-        <CardTitle className="text-base">Credential Health</CardTitle>
+        <CardTitle className="text-base">{t('credentialHealth.title')}</CardTitle>
       </CardHeader>
       <CardContent>
         <div className="space-y-3">
@@ -137,6 +142,7 @@ function CredentialHealthSkeleton() {
 }
 
 export function CredentialHealthList() {
+  const { t } = useTranslation();
   const { data: authData, isLoading } = useCliproxyAuth();
   const { data: stats } = useCliproxyStats(true);
   const { privacyMode } = usePrivacy();
@@ -155,7 +161,8 @@ export function CredentialHealthList() {
           name: account.id,
           provider: status.provider,
           status: (account as { status?: CredentialStatus }).status ?? 'ready',
-          statusMessage: (account as { statusMessage?: string }).statusMessage ?? 'Ready',
+          statusMessage:
+            (account as { statusMessage?: string }).statusMessage ?? t('credentialHealth.ready'),
           email: account.email,
           lastUsedAt: runtimeLastUsed || account.lastUsedAt,
         };
@@ -166,11 +173,11 @@ export function CredentialHealthList() {
     return (
       <Card>
         <CardHeader>
-          <CardTitle className="text-base">Credential Health</CardTitle>
+          <CardTitle className="text-base">{t('credentialHealth.title')}</CardTitle>
         </CardHeader>
         <CardContent>
           <p className="text-sm text-muted-foreground text-center py-4">
-            No credentials configured. Use the login buttons above to authenticate.
+            {t('credentialHealth.noCredentialsConfigured')}
           </p>
         </CardContent>
       </Card>
@@ -180,7 +187,7 @@ export function CredentialHealthList() {
   return (
     <Card>
       <CardHeader>
-        <CardTitle className="text-base">Credential Health</CardTitle>
+        <CardTitle className="text-base">{t('credentialHealth.title')}</CardTitle>
       </CardHeader>
       <CardContent className="p-0">
         {credentials.map((cred, i) => (

ui/src/components/cliproxy/overview/model-preferences-grid.tsx

@@ -10,31 +10,34 @@ import { Skeleton } from '@/components/ui/skeleton';
 import { Cpu, AlertCircle } from 'lucide-react';
 import { useCliproxyModels, useCliproxyUpdateCheck } from '@/hooks/use-cliproxy';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 /** Category display configuration */
-const CATEGORY_CONFIG: Record<string, { name: string; color: string; bgColor: string }> = {
-  google: { name: 'Google (Gemini)', color: 'text-blue-600', bgColor: 'bg-blue-50' },
-  openai: { name: 'OpenAI (GPT)', color: 'text-green-600', bgColor: 'bg-green-50' },
-  anthropic: { name: 'Anthropic (Claude)', color: 'text-orange-600', bgColor: 'bg-orange-50' },
-  antigravity: { name: 'Antigravity', color: 'text-purple-600', bgColor: 'bg-purple-50' },
-  other: { name: 'Other', color: 'text-gray-600', bgColor: 'bg-gray-50' },
+const CATEGORY_CONFIG: Record<string, { key: string; color: string; bgColor: string }> = {
+  google: { key: 'google', color: 'text-blue-600', bgColor: 'bg-blue-50' },
+  openai: { key: 'openai', color: 'text-green-600', bgColor: 'bg-green-50' },
+  anthropic: { key: 'anthropic', color: 'text-orange-600', bgColor: 'bg-orange-50' },
+  antigravity: { key: 'antigravity', color: 'text-purple-600', bgColor: 'bg-purple-50' },
+  other: { key: 'other', color: 'text-gray-600', bgColor: 'bg-gray-50' },
 };
 
 function getCategoryDisplay(category: string) {
+  const normalized = category.toLowerCase();
+  const configured = CATEGORY_CONFIG[normalized];
   return (
-    CATEGORY_CONFIG[category.toLowerCase()] || {
-      name: category.charAt(0).toUpperCase() + category.slice(1),
+    configured || {
+      key: 'other',
       color: 'text-gray-600',
       bgColor: 'bg-gray-50',
     }
   );
 }
 
-function ModelPreferencesSkeleton() {
+function ModelPreferencesSkeleton({ title }: { title: string }) {
   return (
     <Card>
       <CardHeader>
-        <CardTitle className="text-base">Available Models</CardTitle>
+        <CardTitle className="text-base">{title}</CardTitle>
       </CardHeader>
       <CardContent>
         <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
@@ -47,21 +50,27 @@ function ModelPreferencesSkeleton() {
   );
 }
 
-function EmptyModelsState() {
+function EmptyModelsState({
+  title,
+  noModels,
+  hint,
+}: {
+  title: string;
+  noModels: string;
+  hint: string;
+}) {
   return (
     <Card>
       <CardHeader>
-        <CardTitle className="text-base">Available Models</CardTitle>
+        <CardTitle className="text-base">{title}</CardTitle>
       </CardHeader>
       <CardContent>
         <div className="flex flex-col items-center justify-center py-8 text-center">
           <div className="w-12 h-12 rounded-full bg-muted flex items-center justify-center mb-3">
             <AlertCircle className="w-6 h-6 text-muted-foreground" />
           </div>
-          <p className="text-sm text-muted-foreground mb-1">No models available</p>
-          <p className="text-xs text-muted-foreground">
-            Start a CLIProxy session to fetch available models
-          </p>
+          <p className="text-sm text-muted-foreground mb-1">{noModels}</p>
+          <p className="text-xs text-muted-foreground">{hint}</p>
         </div>
       </CardContent>
     </Card>
@@ -69,6 +78,7 @@ function EmptyModelsState() {
 }
 
 export function ModelPreferencesGrid() {
+  const { t } = useTranslation();
   const { data: modelsData, isLoading, isError } = useCliproxyModels();
   const { data: updateCheck } = useCliproxyUpdateCheck();
   const backendLabel = updateCheck?.backendLabel ?? 'CLIProxy';
@@ -86,11 +96,17 @@ export function ModelPreferencesGrid() {
   }, [modelsData]);
 
   if (isLoading) {
-    return <ModelPreferencesSkeleton />;
+    return <ModelPreferencesSkeleton title={t('cliproxyOverviewComponents.availableModels')} />;
   }
 
   if (isError || !modelsData || modelsData.totalCount === 0) {
-    return <EmptyModelsState />;
+    return (
+      <EmptyModelsState
+        title={t('cliproxyOverviewComponents.availableModels')}
+        noModels={t('cliproxyOverviewComponents.noModelsAvailable')}
+        hint={t('cliproxyOverviewComponents.startSessionHint')}
+      />
+    );
   }
 
   return (
@@ -98,13 +114,13 @@ export function ModelPreferencesGrid() {
       <CardHeader>
         <CardTitle className="text-base flex items-center gap-2">
           <Cpu className="w-4 h-4" />
-          Available Models
+          {t('cliproxyOverviewComponents.availableModels')}
           <Badge variant="secondary" className="text-xs">
-            {modelsData.totalCount} total
+            {t('cliproxyOverviewComponents.totalCount', { count: modelsData.totalCount })}
           </Badge>
         </CardTitle>
         <CardDescription>
-          Models available through {backendLabel}, grouped by provider
+          {t('cliproxyOverviewComponents.availableThroughGroupedByProvider', { backendLabel })}
         </CardDescription>
       </CardHeader>
       <CardContent>
@@ -115,7 +131,9 @@ export function ModelPreferencesGrid() {
               className={cn('p-4 rounded-lg border', display.bgColor, 'border-transparent')}
             >
               <div className="flex items-center justify-between mb-3">
-                <h3 className={cn('font-medium text-sm', display.color)}>{display.name}</h3>
+                <h3 className={cn('font-medium text-sm', display.color)}>
+                  {t(`cliproxyModelCategory.${display.key}`)}
+                </h3>
                 <Badge variant="outline" className="text-xs">
                   {models.length}
                 </Badge>
@@ -132,7 +150,7 @@ export function ModelPreferencesGrid() {
                 ))}
                 {models.length > 5 && (
                   <div className="text-xs text-muted-foreground italic">
-                    +{models.length - 5} more
+                    {t('cliproxyOverviewComponents.moreCount', { count: models.length - 5 })}
                   </div>
                 )}
               </div>

ui/src/components/cliproxy/overview/quick-stats-row.tsx

@@ -4,6 +4,7 @@
  */
 
 import type { ReactNode } from 'react';
+import { useTranslation } from 'react-i18next';
 import { Card, CardContent } from '@/components/ui/card';
 import { Activity, CheckCircle2, Coins, Cpu } from 'lucide-react';
 import { useCliproxyStats } from '@/hooks/use-cliproxy';
@@ -45,6 +46,7 @@ function StatsSkeleton() {
 }
 
 export function QuickStatsRow() {
+  const { t } = useTranslation();
   const { data: stats, isLoading } = useCliproxyStats();
 
   if (isLoading) {
@@ -71,16 +73,24 @@ export function QuickStatsRow() {
     <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
       <StatCard
         icon={<Activity className="w-4 h-4" />}
-        label="Total Requests"
+        label={t('quickStats.totalRequests')}
         value={totalRequests}
       />
       <StatCard
         icon={<CheckCircle2 className="w-4 h-4" />}
-        label="Success Rate"
+        label={t('quickStats.successRate')}
         value={`${successRate}%`}
       />
-      <StatCard icon={<Coins className="w-4 h-4" />} label="Total Tokens" value={tokenDisplay} />
-      <StatCard icon={<Cpu className="w-4 h-4" />} label="Active Models" value={modelCount} />
+      <StatCard
+        icon={<Coins className="w-4 h-4" />}
+        label={t('quickStats.totalTokens')}
+        value={tokenDisplay}
+      />
+      <StatCard
+        icon={<Cpu className="w-4 h-4" />}
+        label={t('quickStats.activeModels')}
+        value={modelCount}
+      />
     </div>
   );
 }

ui/src/components/cliproxy/provider-editor/custom-preset-dialog.tsx

@@ -18,6 +18,7 @@ import {
 import { Sparkles, Loader2, Star, Zap } from 'lucide-react';
 import { FlexibleModelSelector } from '../provider-model-selector';
 import type { CustomPresetDialogProps, ModelMappingValues } from './types';
+import { useTranslation } from 'react-i18next';
 
 export function CustomPresetDialog({
   open,
@@ -29,6 +30,7 @@ export function CustomPresetDialog({
   catalog,
   allModels,
 }: CustomPresetDialogProps) {
+  const { t } = useTranslation();
   const [values, setValues] = useState<ModelMappingValues>(currentValues);
   const [presetName, setPresetName] = useState('');
 
@@ -48,54 +50,54 @@ export function CustomPresetDialog({
         <DialogHeader>
           <DialogTitle className="flex items-center gap-2">
             <Sparkles className="w-4 h-4" />
-            Custom Preset
+            {t('customPresetDialog.title')}
           </DialogTitle>
         </DialogHeader>
         <div className="space-y-4 py-4">
           <div className="space-y-2">
-            <Label htmlFor="preset-name">Preset Name (optional)</Label>
+            <Label htmlFor="preset-name">{t('customPresetDialog.presetNameOptional')}</Label>
             <Input
               id="preset-name"
               value={presetName}
               onChange={(e) => setPresetName(e.target.value)}
-              placeholder="e.g., My Custom Config"
+              placeholder={t('customPresetDialog.presetNamePlaceholder')}
               className="text-sm"
             />
           </div>
           <Separator />
           {catalog?.provider === 'codex' && (
             <p className="text-[11px] text-muted-foreground rounded-md border bg-muted/30 px-2.5 py-2">
-              Codex tip: suffixes <code>-medium</code>, <code>-high</code>, and <code>-xhigh</code>{' '}
-              pin effort. Unsuffixed models use Thinking settings.
+              {t('customPresetDialog.codexTipPrefix')} <code>-medium</code>, <code>-high</code>, and{' '}
+              <code>-xhigh</code> {t('customPresetDialog.codexTipSuffix')}
             </p>
           )}
           <FlexibleModelSelector
-            label="Default Model"
-            description="Used when no specific tier is requested"
+            label={t('customPresetDialog.defaultModel')}
+            description={t('customPresetDialog.defaultModelDesc')}
             value={values.default}
             onChange={(model) => setValues({ ...values, default: model })}
             catalog={catalog}
             allModels={allModels}
           />
           <FlexibleModelSelector
-            label="Opus (Most capable)"
-            description="For complex reasoning tasks"
+            label={t('customPresetDialog.opusModel')}
+            description={t('customPresetDialog.opusModelDesc')}
             value={values.opus}
             onChange={(model) => setValues({ ...values, opus: model })}
             catalog={catalog}
             allModels={allModels}
           />
           <FlexibleModelSelector
-            label="Sonnet (Balanced)"
-            description="Balance of speed and capability"
+            label={t('customPresetDialog.sonnetModel')}
+            description={t('customPresetDialog.sonnetModelDesc')}
             value={values.sonnet}
             onChange={(model) => setValues({ ...values, sonnet: model })}
             catalog={catalog}
             allModels={allModels}
           />
           <FlexibleModelSelector
-            label="Haiku (Fast)"
-            description="Quick responses for simple tasks"
+            label={t('customPresetDialog.haikuModel')}
+            description={t('customPresetDialog.haikuModelDesc')}
             value={values.haiku}
             onChange={(model) => setValues({ ...values, haiku: model })}
             catalog={catalog}
@@ -104,7 +106,7 @@ export function CustomPresetDialog({
         </div>
         <DialogFooter className="gap-2 sm:gap-0">
           <Button variant="outline" onClick={onClose}>
-            Cancel
+            {t('customPresetDialog.cancel')}
           </Button>
           {onSave && (
             <Button
@@ -117,12 +119,12 @@ export function CustomPresetDialog({
               ) : (
                 <Star className="w-4 h-4 mr-1" />
               )}
-              Save Preset
+              {t('customPresetDialog.savePreset')}
             </Button>
           )}
           <Button onClick={() => onApply(values, presetName || undefined)}>
             <Zap className="w-4 h-4 mr-1" />
-            Apply Preset
+            {t('customPresetDialog.applyPreset')}
           </Button>
         </DialogFooter>
       </DialogContent>

ui/src/components/cliproxy/provider-editor/index.tsx

@@ -17,6 +17,7 @@ import {
   useDeletePreset,
 } from '@/hooks/use-cliproxy';
 import { CLIPROXY_DEFAULT_PORT } from '@/lib/preset-utils';
+import i18n from '@/lib/i18n';
 import { usePrivacy } from '@/contexts/privacy-context';
 import { useProviderEditor } from './use-provider-editor';
 import { CustomPresetDialog } from './custom-preset-dialog';
@@ -155,7 +156,7 @@ export function ProviderEditor({
 
   const handleCustomPresetSave = (values: ModelMappingValues, presetName?: string) => {
     if (!presetName) {
-      toast.error('Please enter a preset name to save');
+      toast.error(i18n.t('commonToast.enterPresetName'));
       return;
     }
     createPresetMutation.mutate({ profile: provider, data: { name: presetName, ...values } });

ui/src/components/cliproxy/provider-model-selector.tsx

@@ -19,6 +19,7 @@ import { Skeleton } from '@/components/ui/skeleton';
 import { AlertTriangle, AlertCircle, Check } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { getCodexEffortDisplay } from '@/lib/codex-effort';
+import { useTranslation } from 'react-i18next';
 
 /** Model entry from catalog */
 export interface ModelEntry {
@@ -72,9 +73,12 @@ export function ProviderModelSelector({
   value,
   onChange,
   disabled,
-  placeholder = 'Select a model',
+  placeholder,
   className,
 }: ProviderModelSelectorProps) {
+  const { t } = useTranslation();
+  const resolvedPlaceholder = placeholder ?? t('providerModelSelector.selectModel');
+
   // Group models by tier
   const groupedModels = useMemo(() => {
     if (!catalog?.models) return { free: [], paid: [] };
@@ -95,7 +99,7 @@ export function ProviderModelSelector({
   if (!catalog || catalog.models.length === 0) {
     return (
       <div className={cn('text-sm text-muted-foreground py-2', className)}>
-        No models available for this provider
+        {t('providerModelSelector.noModelsForProvider')}
       </div>
     );
   }
@@ -110,12 +114,12 @@ export function ProviderModelSelector({
         <span className="truncate">{model.name}</span>
         {model.broken && (
           <Badge variant="destructive" className="text-[9px] h-4 px-1">
-            BROKEN
+            {t('providerModelSelector.broken')}
           </Badge>
         )}
         {model.deprecated && (
           <Badge variant="secondary" className="text-[9px] h-4 px-1">
-            DEPRECATED
+            {t('providerModelSelector.deprecated')}
           </Badge>
         )}
         {value === model.id && <Check className="w-3 h-3 text-primary ml-auto" />}
@@ -127,13 +131,13 @@ export function ProviderModelSelector({
     <div className={cn('space-y-2', className)}>
       <Select value={value || ''} onValueChange={onChange} disabled={disabled}>
         <SelectTrigger className="w-full">
-          <SelectValue placeholder={placeholder}>
+          <SelectValue placeholder={resolvedPlaceholder}>
             {selectedModel && (
               <div className="flex items-center gap-2">
                 <span className="truncate">{selectedModel.name}</span>
                 {selectedModel.tier === 'paid' && (
                   <Badge variant="outline" className="text-[9px] h-4 px-1">
-                    PAID
+                    {t('providerModelSelector.paid')}
                   </Badge>
                 )}
               </div>
@@ -143,13 +147,17 @@ export function ProviderModelSelector({
         <SelectContent>
           {groupedModels.free.length > 0 && (
             <SelectGroup>
-              <SelectLabel className="text-xs text-muted-foreground">Free Tier</SelectLabel>
+              <SelectLabel className="text-xs text-muted-foreground">
+                {t('providerModelSelector.freeTier')}
+              </SelectLabel>
               {groupedModels.free.map(renderModelItem)}
             </SelectGroup>
           )}
           {groupedModels.paid.length > 0 && (
             <SelectGroup>
-              <SelectLabel className="text-xs text-amber-600">Paid Tier</SelectLabel>
+              <SelectLabel className="text-xs text-amber-600">
+                {t('providerModelSelector.paidTier')}
+              </SelectLabel>
               {groupedModels.paid.map(renderModelItem)}
             </SelectGroup>
           )}
@@ -161,7 +169,7 @@ export function ProviderModelSelector({
         <div className="flex items-start gap-2 p-2 bg-destructive/10 rounded-md text-xs text-destructive">
           <AlertTriangle className="w-3.5 h-3.5 mt-0.5 shrink-0" />
           <div>
-            <p className="font-medium">This model has known issues</p>
+            <p className="font-medium">{t('providerModelSelector.modelKnownIssues')}</p>
             {selectedModel.issueUrl && (
               <a
                 href={selectedModel.issueUrl}
@@ -169,7 +177,7 @@ export function ProviderModelSelector({
                 rel="noopener noreferrer"
                 className="underline hover:no-underline"
               >
-                View issue details
+                {t('providerModelSelector.viewIssueDetails')}
               </a>
             )}
           </div>
@@ -180,7 +188,7 @@ export function ProviderModelSelector({
         <div className="flex items-start gap-2 p-2 bg-amber-500/10 rounded-md text-xs text-amber-700">
           <AlertCircle className="w-3.5 h-3.5 mt-0.5 shrink-0" />
           <div>
-            <p className="font-medium">This model is deprecated</p>
+            <p className="font-medium">{t('providerModelSelector.modelDeprecated')}</p>
             {selectedModel.deprecationReason && (
               <p className="opacity-80">{selectedModel.deprecationReason}</p>
             )}
@@ -212,6 +220,7 @@ export function ModelMappingSelector({
   onChange,
   disabled,
 }: ModelMappingSelectorProps) {
+  const { t } = useTranslation();
   if (!catalog) return null;
 
   return (
@@ -219,7 +228,7 @@ export function ModelMappingSelector({
       <label className="text-xs font-medium text-muted-foreground">{label}</label>
       <Select value={value || ''} onValueChange={onChange} disabled={disabled}>
         <SelectTrigger className="h-8 text-sm">
-          <SelectValue placeholder="Select model">
+          <SelectValue placeholder={t('providerModelSelector.selectModel')}>
             {value && <span className="truncate font-mono text-xs">{value}</span>}
           </SelectValue>
         </SelectTrigger>
@@ -230,7 +239,7 @@ export function ModelMappingSelector({
                 <span className="truncate text-sm">{model.name}</span>
                 {model.tier === 'paid' && (
                   <Badge variant="outline" className="text-[9px] h-4 px-1">
-                    PAID
+                    {t('providerModelSelector.paid')}
                   </Badge>
                 )}
               </div>
@@ -262,6 +271,7 @@ export function FlexibleModelSelector({
   allModels,
   disabled,
 }: FlexibleModelSelectorProps) {
+  const { t } = useTranslation();
   // Combine catalog models (recommended) with all available models
   const catalogModelIds = new Set(catalog?.models.map((m) => m.id) || []);
   const isCodexProvider = catalog?.provider === 'codex';
@@ -275,7 +285,7 @@ export function FlexibleModelSelector({
       </div>
       <Select value={value || ''} onValueChange={onChange} disabled={disabled}>
         <SelectTrigger className="h-9">
-          <SelectValue placeholder="Select model">
+          <SelectValue placeholder={t('providerModelSelector.selectModel')}>
             {value && (
               <div className="flex items-center gap-2">
                 <span className="truncate font-mono text-xs">{value}</span>
@@ -295,7 +305,9 @@ export function FlexibleModelSelector({
           {/* Recommended models from catalog */}
           {catalog && catalog.models.length > 0 && (
             <SelectGroup>
-              <SelectLabel className="text-xs text-primary">Recommended</SelectLabel>
+              <SelectLabel className="text-xs text-primary">
+                {t('providerModelSelector.recommended')}
+              </SelectLabel>
               {catalog.models.map((model) => {
                 const codexEffort = isCodexProvider ? getCodexEffortDisplay(model.id) : null;
                 return (
@@ -304,7 +316,7 @@ export function FlexibleModelSelector({
                       <span className="truncate font-mono text-xs">{model.id}</span>
                       {model.tier === 'paid' && (
                         <Badge variant="outline" className="text-[9px] h-4 px-1">
-                          PAID
+                          {t('providerModelSelector.paid')}
                         </Badge>
                       )}
                       {codexEffort && (
@@ -327,7 +339,7 @@ export function FlexibleModelSelector({
           {allModels.length > 0 && (
             <SelectGroup>
               <SelectLabel className="text-xs text-muted-foreground">
-                All Models ({allModels.length})
+                {t('providerModelSelector.allModelsCount', { count: allModels.length })}
               </SelectLabel>
               {allModels
                 .filter((m) => !catalogModelIds.has(m.id))
@@ -355,7 +367,9 @@ export function FlexibleModelSelector({
 
           {/* Fallback if no models available */}
           {(!catalog || catalog.models.length === 0) && allModels.length === 0 && (
-            <div className="py-2 px-3 text-xs text-muted-foreground">No models available</div>
+            <div className="py-2 px-3 text-xs text-muted-foreground">
+              {t('providerModelSelector.noModelsAvailable')}
+            </div>
           )}
         </SelectContent>
       </Select>

ui/src/components/cliproxy/sync/sync-dialog.tsx

@@ -14,6 +14,7 @@ import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { Loader2, Upload, CheckCircle } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import { useSyncPreview, useExecuteSync } from '@/hooks/use-cliproxy-sync';
 
@@ -23,6 +24,7 @@ interface SyncDialogProps {
 }
 
 export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
+  const { t } = useTranslation();
   const { data: preview, isLoading: previewLoading } = useSyncPreview();
   const { mutate: executeSync, isPending: isSyncing, isSuccess, reset } = useExecuteSync();
 
@@ -45,11 +47,9 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
         <DialogHeader>
           <DialogTitle className="flex items-center gap-2">
             <Upload className="w-5 h-5" />
-            Sync Profiles to Local CLIProxy
+            {t('syncDialog.title')}
           </DialogTitle>
-          <DialogDescription>
-            Sync your CCS API profiles to the local CLIProxy config.yaml.
-          </DialogDescription>
+          <DialogDescription>{t('syncDialog.description')}</DialogDescription>
         </DialogHeader>
 
         <div className="mt-4">
@@ -59,8 +59,8 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
             </div>
           ) : preview?.count === 0 ? (
             <div className="text-center py-8 text-muted-foreground">
-              <p>No profiles configured to sync.</p>
-              <p className="text-sm mt-2">Create API profiles first using the Profiles tab.</p>
+              <p>{t('syncDialog.noProfiles')}</p>
+              <p className="text-sm mt-2">{t('syncDialog.createProfilesFirst')}</p>
             </div>
           ) : (
             <ScrollArea className="h-[300px] pr-4">
@@ -74,7 +74,7 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
                       <div className="font-medium">{profile.name}</div>
                       {profile.modelName && (
                         <div className="text-xs text-muted-foreground truncate max-w-[300px]">
-                          Model: {profile.modelName}
+                          {t('syncDialog.modelLabel')} {profile.modelName}
                         </div>
                       )}
                       {profile.baseUrl && (
@@ -84,7 +84,7 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
                       )}
                     </div>
                     <Badge variant="outline" className="text-xs">
-                      Ready
+                      {t('syncDialog.ready')}
                     </Badge>
                   </div>
                 ))}
@@ -94,11 +94,11 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
 
           <div className="flex items-center justify-between mt-6 pt-4 border-t">
             <div className="text-sm text-muted-foreground">
-              {preview?.count ?? 0} profile{(preview?.count ?? 0) !== 1 ? 's' : ''} to sync
+              {t('syncDialog.profilesToSync', { count: preview?.count ?? 0 })}
             </div>
             <div className="flex gap-2">
               <Button variant="outline" onClick={handleClose}>
-                Cancel
+                {t('syncDialog.cancel')}
               </Button>
               <Button
                 onClick={handleSync}
@@ -108,17 +108,17 @@ export function SyncDialog({ open, onOpenChange }: SyncDialogProps) {
                 {isSyncing ? (
                   <>
                     <Loader2 className="w-4 h-4 animate-spin" />
-                    Syncing...
+                    {t('syncDialog.syncing')}
                   </>
                 ) : isSuccess ? (
                   <>
                     <CheckCircle className="w-4 h-4" />
-                    Synced!
+                    {t('syncDialog.synced')}
                   </>
                 ) : (
                   <>
                     <Upload className="w-4 h-4" />
-                    Sync Now
+                    {t('syncDialog.syncNow')}
                   </>
                 )}
               </Button>

ui/src/components/cliproxy/sync/sync-status-card.tsx

@@ -9,10 +9,12 @@ import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Loader2, RefreshCw, FileDown, Check, AlertCircle } from 'lucide-react';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 import { SyncDialog } from './sync-dialog';
 import { useSyncStatus, useExecuteSync } from '@/hooks/use-cliproxy-sync';
 
 export function SyncStatusCard() {
+  const { t } = useTranslation();
   const [dialogOpen, setDialogOpen] = useState(false);
   const { data: status, isLoading, refetch } = useSyncStatus();
   const { mutate: executeSync, isPending: isSyncing } = useExecuteSync();
@@ -31,7 +33,7 @@ export function SyncStatusCard() {
         <CardHeader className="pb-3">
           <CardTitle className="text-sm font-medium flex items-center gap-2">
             <FileDown className="w-4 h-4" />
-            Profile Sync
+            {t('syncStatusCard.profileSync')}
           </CardTitle>
         </CardHeader>
         <CardContent className="flex items-center justify-center py-6">
@@ -50,7 +52,7 @@ export function SyncStatusCard() {
           <div className="flex items-center justify-between">
             <CardTitle className="text-sm font-medium flex items-center gap-2">
               <FileDown className="w-4 h-4" />
-              Profile Sync
+              {t('syncStatusCard.profileSync')}
             </CardTitle>
             <Badge
               variant={isConfigured ? 'default' : 'secondary'}
@@ -62,22 +64,24 @@ export function SyncStatusCard() {
               )}
             >
               {isConfigured ? <Check className="w-3 h-3" /> : <AlertCircle className="w-3 h-3" />}
-              {isConfigured ? 'Ready' : 'No Config'}
+              {isConfigured ? t('syncStatusCard.ready') : t('syncStatusCard.noConfig')}
             </Badge>
           </div>
         </CardHeader>
         <CardContent className="space-y-4">
           {isConfigured && (
             <div className="text-xs text-muted-foreground">
-              Syncs API profiles to local CLIProxy config
+              {t('syncStatusCard.syncsProfilesDesc')}
             </div>
           )}
 
           {!isConfigured && (
-            <p className="text-xs text-muted-foreground">
-              Run <code className="bg-muted px-1 rounded">ccs doctor --fix</code> to generate
-              config.
-            </p>
+            <p
+              className="text-xs text-muted-foreground"
+              dangerouslySetInnerHTML={{
+                __html: t('syncStatusCard.runDoctorHint'),
+              }}
+            />
           )}
 
           {status?.error && <p className="text-xs text-red-500">{status.error}</p>}
@@ -89,7 +93,7 @@ export function SyncStatusCard() {
               className="flex-1"
               onClick={() => setDialogOpen(true)}
             >
-              Details
+              {t('syncStatusCard.details')}
             </Button>
             <Button
               variant="default"
@@ -103,7 +107,7 @@ export function SyncStatusCard() {
               ) : (
                 <RefreshCw className="w-3 h-3" />
               )}
-              Sync Now
+              {t('syncStatusCard.syncNow')}
             </Button>
           </div>
         </CardContent>

ui/src/components/compatible-cli/raw-json-settings-editor-panel.tsx

@@ -4,6 +4,7 @@ import { Copy, FileCode2, Loader2, RefreshCw, Save } from 'lucide-react';
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
 import { CodeEditor } from '@/components/shared/code-editor';
+import i18n from '@/lib/i18n';
 import { cn } from '@/lib/utils';
 
 interface RawJsonSettingsEditorPanelProps {
@@ -39,7 +40,7 @@ export function RawJsonSettingsEditorPanel({
     if (!value) return;
     await navigator.clipboard.writeText(value);
     setCopied(true);
-    toast.success('Settings copied to clipboard');
+    toast.success(i18n.t('commonToast.settingsCopied'));
     window.setTimeout(() => setCopied(false), 1500);
   };
 

ui/src/components/copilot/config-form/model-selector.tsx

@@ -16,6 +16,7 @@ import {
 import { Check } from 'lucide-react';
 import type { FlexibleModelSelectorProps } from './types';
 import { getPlanBadgeStyle, getMultiplierDisplay } from './utils';
+import { useTranslation } from 'react-i18next';
 
 export function FlexibleModelSelector({
   label,
@@ -25,6 +26,7 @@ export function FlexibleModelSelector({
   models,
   disabled,
 }: FlexibleModelSelectorProps) {
+  const { t } = useTranslation();
   // Find current model for display
   const currentModel = models.find((m) => m.id === value);
 
@@ -36,7 +38,7 @@ export function FlexibleModelSelector({
       </div>
       <Select value={value || ''} onValueChange={onChange} disabled={disabled}>
         <SelectTrigger className="h-9">
-          <SelectValue placeholder="Select model">
+          <SelectValue placeholder={t('componentModelSelector.selectModel')}>
             {value && (
               <div className="flex items-center gap-2">
                 <span className="truncate font-mono text-xs">{value}</span>
@@ -55,7 +57,7 @@ export function FlexibleModelSelector({
         <SelectContent className="max-h-[300px]">
           <SelectGroup>
             <SelectLabel className="text-xs text-muted-foreground">
-              Available Models ({models.length})
+              {t('componentModelSelector.availableModelsCount', { count: models.length })}
             </SelectLabel>
             {models.map((model) => (
               <SelectItem key={model.id} value={model.id}>
@@ -76,7 +78,7 @@ export function FlexibleModelSelector({
                   )}
                   {model.preview && (
                     <Badge variant="secondary" className="text-[9px] px-1 py-0 h-4">
-                      Preview
+                      {t('componentModelSelector.preview')}
                     </Badge>
                   )}
                   {value === model.id && <Check className="w-3 h-3 text-primary ml-auto" />}

ui/src/components/copilot/config-form/settings-tab.tsx

@@ -16,6 +16,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select';
+import { useTranslation } from 'react-i18next';
 
 interface SettingsTabProps {
   enabled: boolean;
@@ -46,6 +47,8 @@ export function SettingsTab({
   onUpdateRateLimit,
   onUpdateWaitOnLimit,
 }: SettingsTabProps) {
+  const { t } = useTranslation();
+
   return (
     <TabsContent
       value="settings"
@@ -57,10 +60,10 @@ export function SettingsTab({
           <div className="flex items-center justify-between rounded-lg border p-4">
             <div className="space-y-0.5">
               <Label htmlFor="enabled" className="text-sm font-medium">
-                Enable Copilot
+                {t('copilotSettings.enableCopilot')}
               </Label>
               <p className="text-xs text-muted-foreground">
-                Allow using GitHub Copilot subscription
+                {t('copilotSettings.enableCopilotDesc')}
               </p>
             </div>
             <Switch id="enabled" checked={enabled} onCheckedChange={onUpdateEnabled} />
@@ -68,12 +71,12 @@ export function SettingsTab({
 
           {/* Basic Settings */}
           <div className="space-y-4">
-            <h3 className="text-sm font-medium">Basic Settings</h3>
+            <h3 className="text-sm font-medium">{t('copilotSettings.basicSettings')}</h3>
 
             {/* Port */}
             <div className="space-y-2">
               <Label htmlFor="port" className="text-xs">
-                Port
+                {t('copilotPage.port')}
               </Label>
               <Input
                 id="port"
@@ -89,16 +92,22 @@ export function SettingsTab({
             {/* Account Type */}
             <div className="space-y-2">
               <Label htmlFor="account-type" className="text-xs">
-                Account Type
+                {t('copilotSettings.accountType')}
               </Label>
               <Select value={accountType} onValueChange={onUpdateAccountType}>
                 <SelectTrigger id="account-type" className="max-w-[150px] h-8">
                   <SelectValue />
                 </SelectTrigger>
                 <SelectContent>
-                  <SelectItem value="individual">Individual</SelectItem>
-                  <SelectItem value="business">Business</SelectItem>
-                  <SelectItem value="enterprise">Enterprise</SelectItem>
+                  <SelectItem value="individual">
+                    {t('copilotSettings.accountTypeIndividual')}
+                  </SelectItem>
+                  <SelectItem value="business">
+                    {t('copilotSettings.accountTypeBusiness')}
+                  </SelectItem>
+                  <SelectItem value="enterprise">
+                    {t('copilotSettings.accountTypeEnterprise')}
+                  </SelectItem>
                 </SelectContent>
               </Select>
             </div>
@@ -108,18 +117,18 @@ export function SettingsTab({
 
           {/* Rate Limiting */}
           <div className="space-y-4">
-            <h3 className="text-sm font-medium">Rate Limiting</h3>
+            <h3 className="text-sm font-medium">{t('copilotSettings.rateLimiting')}</h3>
 
             <div className="space-y-2">
               <Label htmlFor="rate-limit" className="text-xs">
-                Rate Limit (seconds)
+                {t('copilotSettings.rateLimitSeconds')}
               </Label>
               <Input
                 id="rate-limit"
                 type="number"
                 value={rateLimit}
                 onChange={(e) => onUpdateRateLimit(e.target.value)}
-                placeholder="No limit"
+                placeholder={t('copilotSettings.noLimit')}
                 min={0}
                 className="max-w-[150px] h-8"
               />
@@ -128,10 +137,10 @@ export function SettingsTab({
             <div className="flex items-center justify-between rounded-lg border p-3">
               <div className="space-y-0.5">
                 <Label htmlFor="wait-on-limit" className="text-xs">
-                  Wait on Rate Limit
+                  {t('copilotSettings.waitOnRateLimit')}
                 </Label>
                 <p className="text-[10px] text-muted-foreground">
-                  Wait instead of error when limit hit
+                  {t('copilotSettings.waitOnRateLimitDesc')}
                 </p>
               </div>
               <Switch
@@ -146,15 +155,15 @@ export function SettingsTab({
 
           {/* Daemon Settings */}
           <div className="space-y-4">
-            <h3 className="text-sm font-medium">Daemon Settings</h3>
+            <h3 className="text-sm font-medium">{t('copilotSettings.daemonSettings')}</h3>
 
             <div className="flex items-center justify-between rounded-lg border p-3">
               <div className="space-y-0.5">
                 <Label htmlFor="auto-start" className="text-xs">
-                  Auto-start Daemon
+                  {t('copilotSettings.autoStartDaemon')}
                 </Label>
                 <p className="text-[10px] text-muted-foreground">
-                  Start copilot-api when using profile
+                  {t('copilotSettings.autoStartDaemonDesc')}
                 </p>
               </div>
               <Switch id="auto-start" checked={autoStart} onCheckedChange={onUpdateAutoStart} />

ui/src/components/health/health-check-item.tsx

@@ -5,6 +5,7 @@ import { useFixHealth, type HealthCheck } from '@/hooks/use-health';
 import { cn } from '@/lib/utils';
 import { useState } from 'react';
 import { toast } from 'sonner';
+import { useTranslation } from 'react-i18next';
 
 const statusConfig = {
   ok: { dot: 'bg-green-500', label: 'OK', labelColor: 'text-green-500' },
@@ -14,6 +15,7 @@ const statusConfig = {
 };
 
 export function HealthCheckItem({ check }: { check: HealthCheck }) {
+  const { t } = useTranslation();
   const fixMutation = useFixHealth();
   const config = statusConfig[check.status];
   const [isOpen, setIsOpen] = useState(false);
@@ -21,7 +23,7 @@ export function HealthCheckItem({ check }: { check: HealthCheck }) {
 
   const copyToClipboard = (text: string) => {
     navigator.clipboard.writeText(text);
-    toast.success('Copied to clipboard');
+    toast.success(t('health.copied'));
   };
 
   // Compact single-line display for items without expandable content
@@ -62,7 +64,7 @@ export function HealthCheckItem({ check }: { check: HealthCheck }) {
             className="h-6 px-2 text-xs opacity-0 group-hover:opacity-100 transition-opacity"
           >
             <Wrench className="w-3 h-3 mr-1" />
-            Fix
+            {t('health.fix')}
           </Button>
         )}
       </div>
@@ -149,7 +151,7 @@ export function HealthCheckItem({ check }: { check: HealthCheck }) {
                     className="h-7 px-3 text-xs"
                   >
                     <Wrench className="w-3 h-3 mr-1" />
-                    Apply Fix
+                    {t('health.applyFix')}
                   </Button>
                 )}
               </div>

ui/src/components/health/health-gauge.tsx

@@ -1,4 +1,5 @@
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 interface HealthGaugeProps {
   passed: number;
@@ -20,6 +21,7 @@ const statusColors = {
 };
 
 export function HealthGauge({ passed, total, status, size = 'md' }: HealthGaugeProps) {
+  const { t } = useTranslation();
   const config = sizeConfig[size];
   const colors = statusColors[status];
   const percentage = total > 0 ? Math.round((passed / total) * 100) : 0;
@@ -83,7 +85,7 @@ export function HealthGauge({ passed, total, status, size = 'md' }: HealthGaugeP
             config.labelSize
           )}
         >
-          health
+          {t('health.healthLabel')}
         </span>
       </div>
     </div>

ui/src/components/health/health-stats-bar.tsx

@@ -1,4 +1,5 @@
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 interface HealthStatsBarProps {
   total: number;
@@ -28,6 +29,7 @@ function StatItem({ label, value, color, bgColor }: StatItemProps) {
 }
 
 export function HealthStatsBar({ total, passed, warnings, errors, info }: HealthStatsBarProps) {
+  const { t } = useTranslation();
   // Calculate percentages for the progress bar
   const passedPct = (passed / total) * 100;
   const warningPct = (warnings / total) * 100;
@@ -68,7 +70,7 @@ export function HealthStatsBar({ total, passed, warnings, errors, info }: Health
       <div className="flex items-center justify-between gap-4 flex-wrap">
         <div className="flex items-center gap-1">
           <span className="text-xs font-medium text-muted-foreground uppercase tracking-wider">
-            Checks
+            {t('health.checks')}
           </span>
           <span className="font-mono font-bold text-lg">{total}</span>
         </div>

ui/src/components/layout/app-sidebar.tsx

@@ -35,6 +35,7 @@ import { useSidebar } from '@/hooks/use-sidebar';
 import { useCliproxyUpdateCheck } from '@/hooks/use-cliproxy';
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/components/ui/collapsible';
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip';
+import { useTranslation } from 'react-i18next';
 
 interface SidebarBadge {
   text: string;
@@ -62,66 +63,69 @@ interface SidebarGroupDef {
   items: SidebarItem[];
 }
 
-// Define navigation groups
-const navGroups: SidebarGroupDef[] = [
-  {
-    title: 'General',
-    items: [
-      { path: '/', icon: Home, label: 'Home' },
-      { path: '/analytics', icon: BarChart3, label: 'Analytics' },
-    ],
-  },
-  {
-    title: 'Identity & Access',
-    items: [
-      {
-        path: '/providers',
-        icon: Key,
-        label: 'API Profiles',
-        badge: { text: 'OpenRouter', icon: '/icons/openrouter.svg' },
-      },
-      {
-        path: '/cliproxy',
-        icon: Zap,
-        label: 'CLIProxy Plus',
-        isCollapsible: true,
-        children: [
-          { path: '/cliproxy', label: 'Overview' },
-          { path: '/cliproxy/control-panel', icon: Gauge, label: 'Control Panel' },
-        ],
-      },
-      { path: '/copilot', icon: Github, label: 'GitHub Copilot' },
-      { path: '/cursor', iconSrc: '/assets/sidebar/cursor.svg', label: 'Cursor IDE' },
-      {
-        path: '/accounts',
-        icon: Users,
-        label: 'Accounts',
-        isCollapsible: true,
-        children: [
-          { path: '/accounts', label: 'All Accounts' },
-          { path: '/shared', icon: FolderOpen, label: 'Shared Data' },
-        ],
-      },
-    ],
-  },
-  {
-    title: 'Compatible CLIs',
-    items: [{ path: '/droid', icon: TerminalSquare, label: 'Factory Droid' }],
-  },
-  {
-    title: 'System',
-    items: [
-      { path: '/health', icon: Activity, label: 'Health' },
-      { path: '/settings', icon: Settings, label: 'Settings' },
-    ],
-  },
-];
+function buildNavGroups(t: (key: string) => string): SidebarGroupDef[] {
+  return [
+    {
+      title: t('nav.general'),
+      items: [
+        { path: '/', icon: Home, label: t('nav.home') },
+        { path: '/analytics', icon: BarChart3, label: t('nav.analytics') },
+      ],
+    },
+    {
+      title: t('nav.identityAccess'),
+      items: [
+        {
+          path: '/providers',
+          icon: Key,
+          label: t('nav.apiProfiles'),
+          badge: { text: 'OpenRouter', icon: '/icons/openrouter.svg' },
+        },
+        {
+          path: '/cliproxy',
+          icon: Zap,
+          label: t('nav.cliproxyPlus'),
+          isCollapsible: true,
+          children: [
+            { path: '/cliproxy', label: t('nav.cliproxyOverview') },
+            { path: '/cliproxy/control-panel', icon: Gauge, label: t('nav.controlPanel') },
+          ],
+        },
+        { path: '/copilot', icon: Github, label: t('nav.githubCopilot') },
+        { path: '/cursor', iconSrc: '/assets/sidebar/cursor.svg', label: t('nav.cursorIde') },
+        {
+          path: '/accounts',
+          icon: Users,
+          label: t('nav.accounts'),
+          isCollapsible: true,
+          children: [
+            { path: '/accounts', label: t('nav.allAccounts') },
+            { path: '/shared', icon: FolderOpen, label: t('nav.sharedData') },
+          ],
+        },
+      ],
+    },
+    {
+      title: t('nav.compatibleClis'),
+      items: [{ path: '/droid', icon: TerminalSquare, label: t('nav.factoryDroid') }],
+    },
+    {
+      title: t('nav.system'),
+      items: [
+        { path: '/health', icon: Activity, label: t('nav.health') },
+        { path: '/settings', icon: Settings, label: t('nav.settings') },
+      ],
+    },
+  ];
+}
 
 export function AppSidebar() {
+  const { t } = useTranslation();
   const location = useLocation();
   const navigate = useNavigate();
   const { state } = useSidebar();
   const { data: updateCheck } = useCliproxyUpdateCheck();
+  const navGroups = buildNavGroups(t);
 
   // Dynamic label for CLIProxy based on backend
   const cliproxyLabel = updateCheck?.backendLabel ?? 'CLIProxy';
@@ -236,7 +240,7 @@ export function AppSidebar() {
                                 </span>
                               </TooltipTrigger>
                               <TooltipContent side="right">
-                                <p>349+ models via OpenRouter</p>
+                                <p>{t('nav.openrouterTooltip')}</p>
                               </TooltipContent>
                             </Tooltip>
                           )}

ui/src/components/layout/language-switcher.tsx

@@ -0,0 +1,38 @@
+import { Globe } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
+import { normalizeLocale, persistLocale, SUPPORTED_LOCALES } from '@/lib/locales';
+
+export function LanguageSwitcher() {
+  const { t, i18n } = useTranslation();
+  const currentLocale = normalizeLocale(i18n.resolvedLanguage ?? i18n.language ?? 'en');
+
+  const handleLocaleChange = (nextLocale: string) => {
+    const normalized = persistLocale(nextLocale);
+    void i18n.changeLanguage(normalized);
+  };
+
+  return (
+    <div className="flex items-center gap-2">
+      <Globe className="h-4 w-4 text-muted-foreground" />
+      <Select value={currentLocale} onValueChange={handleLocaleChange}>
+        <SelectTrigger className="h-8 w-[150px]">
+          <SelectValue placeholder={t('layout.languageSwitcher')} />
+        </SelectTrigger>
+        <SelectContent>
+          {SUPPORTED_LOCALES.map((locale) => (
+            <SelectItem key={locale} value={locale}>
+              {t(`locale.${locale}`)}
+            </SelectItem>
+          ))}
+        </SelectContent>
+      </Select>
+    </div>
+  );
+}

ui/src/components/layout/layout.tsx

@@ -14,6 +14,7 @@ import { SponsorButton } from '@/components/shared/sponsor-button';
 import { ProjectSelectionDialog } from '@/components/shared/project-selection-dialog';
 import { DeviceCodeDialog } from '@/components/shared/device-code-dialog';
 import { UserMenu } from '@/components/auth/user-menu';
+import { LanguageSwitcher } from './language-switcher';
 import { useProjectSelection } from '@/hooks/use-project-selection';
 import { useDeviceCode } from '@/hooks/use-device-code';
 import { storeLastRoute } from '@/lib/last-route';
@@ -47,6 +48,7 @@ export function Layout() {
           </div>
           <div className="flex items-center gap-2">
             <ConnectionIndicator />
+            <LanguageSwitcher />
             <DocsLink />
             <GitHubLink />
             <PrivacyToggle />

ui/src/components/monitoring/auth-monitor/index.tsx

@@ -5,6 +5,7 @@
  */
 
 import { useState, useMemo } from 'react';
+import { useTranslation } from 'react-i18next';
 import { STATUS_COLORS } from '@/lib/utils';
 import { Skeleton } from '@/components/ui/skeleton';
 import { AccountFlowViz } from '@/components/account-flow-viz';
@@ -20,6 +21,7 @@ import { SummaryCard } from './components/summary-card';
 const STORAGE_KEY = 'auth-monitor-selected-provider';
 
 export function AuthMonitor() {
+  const { t } = useTranslation();
   const {
     accounts,
     totalSuccess,
@@ -117,7 +119,7 @@ export function AuthMonitor() {
             <span>Updated {timeSinceUpdate || 'now'}</span>
           </div>
           <span className="text-muted-foreground/50">|</span>
-          <span>{accounts.length} accounts</span>
+          <span>{t('authMonitor.accountsCount', { count: accounts.length })}</span>
           <span className="font-mono">{totalRequests.toLocaleString()} req</span>
         </div>
       </div>
@@ -126,25 +128,25 @@ export function AuthMonitor() {
       <div className="grid grid-cols-4 gap-3 p-4 border-b border-border bg-muted/20 dark:bg-zinc-900/30">
         <SummaryCard
           icon={<Activity className="w-4 h-4" />}
-          label="Accounts"
+          label={t('authMonitor.accounts')}
           value={accounts.length}
           color="var(--accent)"
         />
         <SummaryCard
           icon={<CheckCircle2 className="w-4 h-4" />}
-          label="Success"
+          label={t('authMonitor.success')}
           value={totalSuccess.toLocaleString()}
           color={STATUS_COLORS.success}
         />
         <SummaryCard
           icon={<XCircle className="w-4 h-4" />}
-          label="Failed"
+          label={t('authMonitor.failed')}
           value={totalFailure.toLocaleString()}
           color={totalFailure > 0 ? STATUS_COLORS.failed : undefined}
         />
         <SummaryCard
           icon={<Activity className="w-4 h-4" />}
-          label="Success Rate"
+          label={t('authMonitor.successRate')}
           value={`${overallSuccessRate}%`}
           color={
             overallSuccessRate === 100

ui/src/components/monitoring/error-logs/index.tsx

@@ -14,10 +14,12 @@ import { useCliproxyStatus } from '@/hooks/use-cliproxy-stats';
 import { Skeleton } from '@/components/ui/skeleton';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { AlertTriangle, FileWarning, GripVertical, GripHorizontal } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { ErrorLogItem } from './error-log-item';
 import { LogContentPanel } from './log-content-panel';
 
 export function ErrorLogsMonitor() {
+  const { t } = useTranslation();
   const { data: status, isLoading: isStatusLoading } = useCliproxyStatus();
   const { data: logs, isLoading, error } = useCliproxyErrorLogs(status?.running ?? false);
 
@@ -142,14 +144,14 @@ export function ErrorLogsMonitor() {
       <div className="flex items-center justify-between px-4 py-3 border-b border-border bg-gradient-to-r from-amber-500/10 via-transparent to-transparent dark:from-amber-500/15 shrink-0">
         <div className="flex items-center gap-2.5">
           <AlertTriangle className="w-4 h-4 text-amber-500" />
-          <span className="text-sm font-semibold tracking-tight">Error Logs</span>
+          <span className="text-sm font-semibold tracking-tight">{t('errorLogs.title')}</span>
           <span className="text-xs text-muted-foreground ml-1">
-            {errorCount} failed request{errorCount !== 1 ? 's' : ''}
+            {t('errorLogs.failedRequests', { count: errorCount })}
           </span>
         </div>
         <div className="flex items-center gap-2 text-xs text-muted-foreground">
           <FileWarning className="w-3.5 h-3.5" />
-          <span>CLIProxy Diagnostics</span>
+          <span>{t('errorLogs.cliproxyDiagnostics')}</span>
         </div>
       </div>
 
@@ -175,7 +177,7 @@ export function ErrorLogsMonitor() {
               </div>
               {logs.length > 50 && (
                 <div className="px-3 py-3 text-center text-[10px] text-muted-foreground border-t border-border/50">
-                  Showing 50 of {logs.length} logs
+                  {t('errorLogs.showingCount', { total: logs.length })}
                 </div>
               )}
             </ScrollArea>

ui/src/components/monitoring/error-logs/log-content-panel.tsx

@@ -8,12 +8,14 @@ import { useCliproxyErrorLogContent } from '@/hooks/use-cliproxy-stats';
 import { Skeleton } from '@/components/ui/skeleton';
 import { CopyButton } from '@/components/ui/copy-button';
 import { Terminal, Info, Code, ArrowUpRight, ArrowDownLeft, FileText } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { parseErrorLog } from '@/lib/error-log-parser';
 import type { TabType, LogContentPanelProps } from './types';
 import { TabButton, StatusBadge } from './ui-primitives';
 import { OverviewTab, HeadersTab, BodyTab, RawTab } from './tab-components';
 
 export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
+  const { t } = useTranslation();
   const [activeTab, setActiveTab] = useState<TabType>('overview');
   const { data: content, isLoading, error } = useCliproxyErrorLogContent(name);
 
@@ -29,7 +31,7 @@ export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
       <div className="flex-1 flex items-center justify-center text-muted-foreground">
         <div className="text-center space-y-3">
           <Terminal className="w-10 h-10 mx-auto opacity-40" />
-          <p className="text-sm">Select a log to view details</p>
+          <p className="text-sm">{t('errorLogs.selectLog')}</p>
         </div>
       </div>
     );
@@ -51,7 +53,7 @@ export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
   if (error || !content || !parsed) {
     return (
       <div className="flex-1 flex items-center justify-center text-muted-foreground">
-        <p className="text-sm">Failed to load log content</p>
+        <p className="text-sm">{t('errorLogs.failedLoadContent')}</p>
       </div>
     );
   }
@@ -69,7 +71,7 @@ export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
           {name && (
             <CopyButton
               value={absolutePath || name}
-              label="Copy absolute path"
+              label={t('errorLogs.copyAbsolutePath')}
               size="icon-sm"
               className="ml-1 text-muted-foreground hover:text-foreground opacity-50 hover:opacity-100 transition-opacity"
             />
@@ -80,7 +82,7 @@ export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
           {content && (
             <CopyButton
               value={content}
-              label="Copy raw log content"
+              label={t('errorLogs.copyRawContent')}
               variant="ghost"
               size="icon-sm"
               className="text-muted-foreground hover:text-foreground"
@@ -99,31 +101,31 @@ export function LogContentPanel({ name, absolutePath }: LogContentPanelProps) {
           onClick={() => setActiveTab('overview')}
           icon={Info}
         >
-          Overview
+          {t('errorLogs.tabOverview')}
         </TabButton>
         <TabButton
           active={activeTab === 'headers'}
           onClick={() => setActiveTab('headers')}
           icon={Code}
         >
-          Headers
+          {t('errorLogs.tabHeaders')}
         </TabButton>
         <TabButton
           active={activeTab === 'request'}
           onClick={() => setActiveTab('request')}
           icon={ArrowUpRight}
         >
-          Request
+          {t('errorLogs.tabRequest')}
         </TabButton>
         <TabButton
           active={activeTab === 'response'}
           onClick={() => setActiveTab('response')}
           icon={ArrowDownLeft}
         >
-          Response
+          {t('errorLogs.tabResponse')}
         </TabButton>
         <TabButton active={activeTab === 'raw'} onClick={() => setActiveTab('raw')} icon={FileText}>
-          Raw
+          {t('errorLogs.tabRaw')}
         </TabButton>
       </div>
 

ui/src/components/monitoring/error-logs/tab-components.tsx

@@ -5,6 +5,7 @@
 
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { Info, Clock, Cpu, AlertTriangle } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import {
   getErrorTypeLabel,
@@ -16,9 +17,11 @@ import { StatusBadge } from './ui-primitives';
 
 /** Overview tab content */
 export function OverviewTab({ parsed }: { parsed: ParsedErrorLog }) {
+  const { t } = useTranslation();
   const quotaResetDisplay =
     formatQuotaResetDelay(parsed.quotaResetDelay) ||
     formatQuotaResetTimestamp(parsed.quotaResetTimestamp);
+  const na = t('errorLogs.na');
 
   return (
     <ScrollArea className="h-full">
@@ -37,7 +40,7 @@ export function OverviewTab({ parsed }: { parsed: ParsedErrorLog }) {
           <div className="flex items-center gap-2.5 p-3 rounded-lg bg-violet-500/10 border border-violet-500/20">
             <Cpu className="w-4 h-4 text-violet-500 shrink-0" />
             <div className="text-sm">
-              <span className="text-muted-foreground">Model: </span>
+              <span className="text-muted-foreground">{t('errorLogs.modelLabel')}</span>
               <span className="font-semibold text-violet-600 dark:text-violet-400">
                 {parsed.model}
               </span>
@@ -50,7 +53,7 @@ export function OverviewTab({ parsed }: { parsed: ParsedErrorLog }) {
           <div className="flex items-center gap-2.5 p-3 rounded-lg bg-amber-500/10 border border-amber-500/20">
             <Clock className="w-4 h-4 text-amber-500 shrink-0" />
             <div className="text-sm">
-              <span className="text-muted-foreground">Quota resets in </span>
+              <span className="text-muted-foreground">{t('errorLogs.quotaResetsIn')}</span>
               <span className="font-semibold text-amber-600 dark:text-amber-400">
                 {quotaResetDisplay}
               </span>
@@ -61,37 +64,37 @@ export function OverviewTab({ parsed }: { parsed: ParsedErrorLog }) {
         {/* Key metrics grid */}
         <div className="grid grid-cols-4 gap-3 text-xs">
           <div className="p-2.5 rounded bg-muted/30 border border-border/50">
-            <div className="text-muted-foreground mb-1">Method</div>
-            <div className="font-medium">{parsed.method || 'N/A'}</div>
+            <div className="text-muted-foreground mb-1">{t('errorLogs.method')}</div>
+            <div className="font-medium">{parsed.method || na}</div>
           </div>
           <div className="p-2.5 rounded bg-muted/30 border border-border/50">
-            <div className="text-muted-foreground mb-1">Provider</div>
-            <div className="font-medium">{parsed.provider || 'N/A'}</div>
+            <div className="text-muted-foreground mb-1">{t('errorLogs.provider')}</div>
+            <div className="font-medium">{parsed.provider || na}</div>
           </div>
           <div className="p-2.5 rounded bg-muted/30 border border-border/50">
-            <div className="text-muted-foreground mb-1">Version</div>
-            <div className="font-medium">{parsed.version || 'N/A'}</div>
+            <div className="text-muted-foreground mb-1">{t('errorLogs.version')}</div>
+            <div className="font-medium">{parsed.version || na}</div>
           </div>
           <div className="p-2.5 rounded bg-muted/30 border border-border/50">
-            <div className="text-muted-foreground mb-1">Endpoint</div>
+            <div className="text-muted-foreground mb-1">{t('errorLogs.endpoint')}</div>
             <div className="font-medium truncate" title={parsed.endpoint}>
-              {parsed.endpoint || 'N/A'}
+              {parsed.endpoint || na}
             </div>
           </div>
         </div>
 
         {/* URL */}
         <div className="text-xs">
-          <div className="text-muted-foreground mb-1.5">URL</div>
+          <div className="text-muted-foreground mb-1.5">{t('errorLogs.url')}</div>
           <div className="font-mono p-2.5 rounded bg-muted/30 border border-border/50 break-all leading-relaxed">
-            {parsed.url || 'N/A'}
+            {parsed.url || na}
           </div>
         </div>
 
         {/* Timestamp */}
         <div className="text-xs">
-          <div className="text-muted-foreground mb-1.5">Timestamp</div>
-          <div className="font-mono">{parsed.timestamp || 'N/A'}</div>
+          <div className="text-muted-foreground mb-1.5">{t('errorLogs.timestamp')}</div>
+          <div className="font-mono">{parsed.timestamp || na}</div>
         </div>
 
         {/* Actionable suggestion based on error type */}
@@ -123,27 +126,14 @@ export function OverviewTab({ parsed }: { parsed: ParsedErrorLog }) {
                     : 'text-blue-600 dark:text-blue-400'
               )}
             >
-              {parsed.errorType === 'rate_limit' && (
-                <>
-                  <strong>Rate Limited.</strong> Switch to a different account or wait for quota
-                  reset.
-                  {parsed.model && (
-                    <>
-                      {' '}
-                      Model <code className="font-mono text-[11px]">{parsed.model}</code> has
-                      exhausted quota.
-                    </>
-                  )}
-                </>
-              )}
-              {parsed.errorType === 'auth' &&
-                'Authentication failed. Re-authenticate via CLIProxy Settings or check API key.'}
-              {parsed.errorType === 'not_found' &&
-                'Endpoint not found. This endpoint may not exist on this provider.'}
-              {parsed.errorType === 'server' &&
-                'Server error from upstream. Retry later or check provider status page.'}
-              {parsed.errorType === 'timeout' &&
-                'Request timed out. Check network connection or increase timeout settings.'}
+              {parsed.errorType === 'rate_limit' &&
+                (parsed.model
+                  ? t('errorLogs.rateLimitedMsg', { model: parsed.model })
+                  : t('errorLogs.rateLimitedMsgNoModel'))}
+              {parsed.errorType === 'auth' && t('errorLogs.authFailedMsg')}
+              {parsed.errorType === 'not_found' && t('errorLogs.notFoundMsg')}
+              {parsed.errorType === 'server' && t('errorLogs.serverErrorMsg')}
+              {parsed.errorType === 'timeout' && t('errorLogs.timeoutMsg')}
             </div>
           </div>
         )}
@@ -178,8 +168,10 @@ export function HeadersTab({ headers }: { headers: Record<string, string> }) {
 
 /** JSON/Body tab content */
 export function BodyTab({ content, label }: { content: string; label: string }) {
+  const { t } = useTranslation();
   if (!content || content.trim() === '') {
-    return <div className="p-4 text-xs text-muted-foreground">No {label.toLowerCase()} body</div>;
+    const key = label === 'Request' ? 'errorLogs.noRequestBody' : 'errorLogs.noResponseBody';
+    return <div className="p-4 text-xs text-muted-foreground">{t(key)}</div>;
   }
 
   // Try to format as JSON

ui/src/components/monitoring/proxy-status-widget.tsx

@@ -51,6 +51,7 @@ import {
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
 import { useQuery, useIsMutating } from '@tanstack/react-query';
 import { api, type CliproxyServerConfig } from '@/lib/api-client';
+import { useTranslation } from 'react-i18next';
 import {
   useProxyStatus,
   useStartProxy,
@@ -89,15 +90,17 @@ function formatUptime(startedAt?: string): string {
   return `${minutes}m`;
 }
 
-function formatTimeAgo(timestamp?: number): string {
+function formatTimeAgo(
+  timestamp: number | undefined,
+  t: (key: string, opts?: { count?: number }) => string
+): string {
   if (!timestamp) return '';
   const diff = Date.now() - timestamp;
   const minutes = Math.floor(diff / (1000 * 60));
   const hours = Math.floor(diff / (1000 * 60 * 60));
-
-  if (minutes < 1) return 'just now';
-  if (minutes < 60) return `${minutes}m ago`;
-  return `${hours}h ago`;
+  if (minutes < 1) return t('proxyStatusWidget.justNow');
+  if (minutes < 60) return t('proxyStatusWidget.minutesAgo', { count: minutes });
+  return t('proxyStatusWidget.hoursAgo', { count: hours });
 }
 
 /** Icon button with tooltip wrapper */
@@ -148,6 +151,7 @@ function IconButton({
 }
 
 export function ProxyStatusWidget() {
+  const { t } = useTranslation();
   const { data: status, isLoading } = useProxyStatus();
   const { data: updateCheck } = useCliproxyUpdateCheck();
   const { data: versionsData, isLoading: versionsLoading } = useCliproxyVersions();
@@ -196,7 +200,9 @@ export function ProxyStatusWidget() {
 
   // Sync status
   const isSyncConfigured = syncStatus?.configured ?? false;
-  const syncStatusText = isSyncConfigured ? 'Sync Ready' : 'No Config';
+  const syncStatusText = isSyncConfigured
+    ? t('proxyStatusWidget.syncReady')
+    : t('proxyStatusWidget.noConfig');
 
   // Target version for update/downgrade badge
   const targetVersion = isUnstable
@@ -257,12 +263,12 @@ export function ProxyStatusWidget() {
         <div className="flex items-center justify-between">
           <div className="flex items-center gap-2">
             <Globe className="w-4 h-4 text-blue-500" />
-            <span className="text-sm font-medium">Remote Proxy</span>
+            <span className="text-sm font-medium">{t('proxyStatusWidget.remoteProxy')}</span>
             <Badge
               variant="secondary"
               className="text-[10px] h-4 px-1.5 bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400"
             >
-              Active
+              {t('proxyStatusWidget.active')}
             </Badge>
           </div>
           <Activity className="w-3 h-3 text-blue-600" />
@@ -273,7 +279,7 @@ export function ProxyStatusWidget() {
             <span className="font-mono">{remoteDisplayHost}</span>
           </div>
           <p className="text-[10px] text-muted-foreground/70 leading-tight">
-            Traffic auto-routed to remote server
+            {t('proxyStatusWidget.trafficAutoRouted')}
           </p>
         </div>
       </div>
@@ -310,21 +316,21 @@ export function ProxyStatusWidget() {
               <>
                 <IconButton
                   icon={isSyncing ? RefreshCw : FileDown}
-                  tooltip="Sync profiles to CLIProxy"
+                  tooltip={t('proxyStatusWidget.tooltipSync')}
                   onClick={() => executeSync()}
                   disabled={!isSyncConfigured || isActioning}
                   isPending={isSyncing}
                 />
                 <IconButton
                   icon={RotateCw}
-                  tooltip="Restart"
+                  tooltip={t('proxyStatusWidget.tooltipRestart')}
                   onClick={() => restartProxy.mutate()}
                   disabled={isActioning}
                   isPending={restartProxy.isPending}
                 />
                 <IconButton
                   icon={Square}
-                  tooltip="Stop"
+                  tooltip={t('proxyStatusWidget.tooltipStop')}
                   onClick={() => stopProxy.mutate()}
                   disabled={isActioning}
                   isPending={stopProxy.isPending}
@@ -335,7 +341,11 @@ export function ProxyStatusWidget() {
             {/* Settings button always visible */}
             <IconButton
               icon={isExpanded ? X : Settings}
-              tooltip={isExpanded ? 'Close' : 'Version settings'}
+              tooltip={
+                isExpanded
+                  ? t('proxyStatusWidget.tooltipClose')
+                  : t('proxyStatusWidget.tooltipVersionSettings')
+              }
               onClick={() => setIsExpanded(!isExpanded)}
               className={isExpanded ? 'bg-muted' : undefined}
             />
@@ -363,7 +373,11 @@ export function ProxyStatusWidget() {
                     : 'bg-green-100 text-green-700 hover:bg-green-200 dark:bg-green-900/30 dark:text-green-400 dark:hover:bg-green-900/50'
                 )}
                 onClick={() => handleInstallVersion(targetVersion)}
-                title={`Click to ${isUnstable ? 'downgrade' : 'update'}`}
+                title={
+                  isUnstable
+                    ? t('proxyStatusWidget.clickToDowngrade')
+                    : t('proxyStatusWidget.clickToUpdate')
+                }
               >
                 {isUnstable ? (
                   <ArrowDown className="w-2.5 h-2.5" />
@@ -379,11 +393,13 @@ export function ProxyStatusWidget() {
         {/* Stats row when running */}
         {isRunning && status && (
           <div className="mt-2 flex items-center gap-4 text-xs text-muted-foreground">
-            <span className="flex items-center gap-1">Port {status.port}</span>
+            <span className="flex items-center gap-1">
+              {t('proxyStatusWidget.port', { port: status.port })}
+            </span>
             {status.sessionCount !== undefined && status.sessionCount > 0 && (
               <span className="flex items-center gap-1">
                 <Users className="w-3 h-3" />
-                {status.sessionCount} session{status.sessionCount !== 1 ? 's' : ''}
+                {t('proxyStatusWidget.sessionCount', { count: status.sessionCount })}
               </span>
             )}
             {status.startedAt && (
@@ -416,7 +432,9 @@ export function ProxyStatusWidget() {
         <Collapsible open={isExpanded} onOpenChange={setIsExpanded}>
           <CollapsibleContent className="mt-3 pt-3 border-t border-muted">
             {/* Section header */}
-            <h4 className="text-xs font-medium text-muted-foreground mb-3">Version Management</h4>
+            <h4 className="text-xs font-medium text-muted-foreground mb-3">
+              {t('proxyStatusWidget.versionManagement')}
+            </h4>
 
             {/* Version picker row */}
             <div className="flex items-center gap-2">
@@ -427,7 +445,7 @@ export function ProxyStatusWidget() {
                 disabled={versionsLoading}
               >
                 <SelectTrigger className="h-8 text-xs flex-1">
-                  <SelectValue placeholder="Select version to install..." />
+                  <SelectValue placeholder={t('proxyStatusWidget.selectVersionPlaceholder')} />
                 </SelectTrigger>
                 <SelectContent>
                   {versionsData?.versions.slice(0, 20).map((v) => {
@@ -439,7 +457,9 @@ export function ProxyStatusWidget() {
                         <span className="flex items-center gap-2">
                           v{v}
                           {v === versionsData.latestStable && (
-                            <span className="text-green-600 dark:text-green-400">(stable)</span>
+                            <span className="text-green-600 dark:text-green-400">
+                              {t('proxyStatusWidget.stable')}
+                            </span>
                           )}
                           {vIsUnstable && (
                             <span className="text-amber-600 dark:text-amber-400">⚠</span>
@@ -464,7 +484,7 @@ export function ProxyStatusWidget() {
                 ) : (
                   <Download className="w-3.5 h-3.5" />
                 )}
-                Install
+                {t('proxyStatusWidget.install')}
               </Button>
             </div>
 
@@ -474,14 +494,20 @@ export function ProxyStatusWidget() {
               isNewerVersionClient(selectedVersion, versionsData.maxStableVersion) && (
                 <div className="mt-2 flex items-center gap-1.5 text-[11px] text-amber-600 dark:text-amber-400">
                   <AlertTriangle className="w-3.5 h-3.5 flex-shrink-0" />
-                  <span>Versions above {versionsData.maxStableVersion} have known issues</span>
+                  <span>
+                    {t('proxyStatusWidget.versionsAboveUnstable', {
+                      version: versionsData.maxStableVersion,
+                    })}
+                  </span>
                 </div>
               )}
 
             {/* Sync time */}
             {updateCheck?.checkedAt && (
               <div className="mt-2 text-[10px] text-muted-foreground/60">
-                Last checked {formatTimeAgo(updateCheck.checkedAt)}
+                {t('proxyStatusWidget.lastChecked', {
+                  time: formatTimeAgo(updateCheck.checkedAt, t),
+                })}
               </div>
             )}
           </CollapsibleContent>
@@ -490,7 +516,9 @@ export function ProxyStatusWidget() {
         {/* Not running state */}
         {!isRunning && (
           <div className="mt-2 flex items-center justify-between">
-            <span className="text-xs text-muted-foreground">Not running</span>
+            <span className="text-xs text-muted-foreground">
+              {t('proxyStatusWidget.notRunning')}
+            </span>
             <Button
               variant="outline"
               size="sm"
@@ -503,7 +531,7 @@ export function ProxyStatusWidget() {
               ) : (
                 <Power className="w-3 h-3" />
               )}
-              Start
+              {t('proxyStatusWidget.start')}
             </Button>
           </div>
         )}
@@ -514,27 +542,32 @@ export function ProxyStatusWidget() {
             <AlertDialogHeader>
               <AlertDialogTitle className="flex items-center gap-2">
                 <AlertTriangle className="w-5 h-5 text-amber-500" />
-                Install Unstable Version?
+                {t('proxyStatusWidget.installUnstableTitle')}
               </AlertDialogTitle>
               <AlertDialogDescription className="space-y-2">
-                <p>
-                  You are about to install <strong>v{pendingInstallVersion}</strong>, which is above
-                  the maximum stable version{' '}
-                  <strong>v{versionsData?.maxStableVersion || '6.6.80'}</strong>.
-                </p>
+                <p
+                  dangerouslySetInnerHTML={{
+                    __html: t('proxyStatusWidget.installUnstableDesc', {
+                      version: pendingInstallVersion ?? '',
+                      maxStable: versionsData?.maxStableVersion || '6.6.80',
+                    }),
+                  }}
+                />
                 <p className="text-amber-600 dark:text-amber-400">
-                  This version has known stability issues and may cause unexpected behavior.
+                  {t('proxyStatusWidget.installUnstableWarning')}
                 </p>
-                <p>Are you sure you want to proceed?</p>
+                <p>{t('proxyStatusWidget.installUnstableConfirm')}</p>
               </AlertDialogDescription>
             </AlertDialogHeader>
             <AlertDialogFooter>
-              <AlertDialogCancel onClick={handleCancelUnstableInstall}>Cancel</AlertDialogCancel>
+              <AlertDialogCancel onClick={handleCancelUnstableInstall}>
+                {t('proxyStatusWidget.cancel')}
+              </AlertDialogCancel>
               <AlertDialogAction
                 onClick={handleConfirmUnstableInstall}
                 className="bg-amber-500 hover:bg-amber-600 text-white"
               >
-                Install Anyway
+                {t('proxyStatusWidget.installAnyway')}
               </AlertDialogAction>
             </AlertDialogFooter>
           </AlertDialogContent>

ui/src/components/profiles/editor/env-editor-section.tsx

@@ -12,6 +12,7 @@ import { MaskedInput } from '@/components/ui/masked-input';
 import { Plus } from 'lucide-react';
 import { isSensitiveKey } from './utils';
 import type { Settings } from './types';
+import { useTranslation } from 'react-i18next';
 
 interface EnvEditorSectionProps {
   currentSettings: Settings | undefined;
@@ -32,6 +33,7 @@ export function EnvEditorSection({
   onEnvValueChange,
   onAddEnvVar,
 }: EnvEditorSectionProps) {
+  const { t } = useTranslation();
   return (
     <>
       {/* Scrollable Environment Variables List */}
@@ -45,7 +47,7 @@ export function EnvEditorSection({
                     {key}
                     {isSensitiveKey(key) && (
                       <Badge variant="secondary" className="text-[10px] px-1 py-0 h-4">
-                        sensitive
+                        {t('envEditor.sensitive')}
                       </Badge>
                     )}
                   </Label>
@@ -67,10 +69,8 @@ export function EnvEditorSection({
             </>
           ) : (
             <div className="py-8 text-center text-muted-foreground bg-muted/30 rounded-lg border border-dashed text-sm">
-              <p>No environment variables configured.</p>
-              <p className="text-xs mt-1 opacity-70">
-                Add variables using the input below or edit the JSON directly.
-              </p>
+              <p>{t('envEditor.none')}</p>
+              <p className="text-xs mt-1 opacity-70">{t('envEditor.noneHint')}</p>
             </div>
           )}
         </div>
@@ -79,18 +79,18 @@ export function EnvEditorSection({
       {/* Fixed Add Input at Bottom */}
       <div className="p-4 border-t bg-background shrink-0">
         <Label className="text-xs font-medium text-muted-foreground">
-          Add Environment Variable
+          {t('envEditor.addVariable')}
         </Label>
         <div className="flex gap-2 mt-2">
           <Input
-            placeholder="VARIABLE_NAME"
+            placeholder={t('envEditor.keyPlaceholder')}
             value={newEnvKey}
             onChange={(e) => onNewEnvKeyChange(e.target.value.toUpperCase())}
             className="font-mono text-sm h-8 w-2/5"
             onKeyDown={(e) => e.key === 'Enter' && newEnvKey.trim() && onAddEnvVar()}
           />
           <Input
-            placeholder="value"
+            placeholder={t('envEditor.valuePlaceholder')}
             value={newEnvValue}
             onChange={(e) => onNewEnvValueChange(e.target.value)}
             className="font-mono text-sm h-8 flex-1"

ui/src/components/profiles/editor/friendly-ui-section.tsx

@@ -19,6 +19,7 @@ import { ChevronRight, Settings2, Plus } from 'lucide-react';
 import { isOpenRouterProfile, extractTierMapping, applyTierMapping } from './utils';
 import { toast } from 'sonner';
 import { cn } from '@/lib/utils';
+import i18n from '@/lib/i18n';
 import type { Settings, SettingsResponse } from './types';
 import type { CliTarget } from '@/lib/api-client';
 
@@ -81,7 +82,7 @@ export function FriendlyUISection({
       onEnvValueChange('ANTHROPIC_DEFAULT_HAIKU_MODEL', modelId);
     }
     // Show feedback toast
-    toast.success('Applied model to all tiers', { duration: 2000 });
+    toast.success(i18n.t('commonToast.appliedModelAllTiers'), { duration: 2000 });
   };
 
   // Handle tier mapping change

ui/src/components/profiles/editor/index.tsx

@@ -16,6 +16,7 @@ import { FriendlyUISection } from './friendly-ui-section';
 import { RawEditorSection } from './raw-editor-section';
 import type { ProfileEditorProps, Settings, SettingsResponse } from './types';
 import { api, type CliTarget } from '@/lib/api-client';
+import i18n from '@/lib/i18n';
 
 export function ProfileEditor({
   profileName,
@@ -143,7 +144,7 @@ export function ProfileEditor({
       queryClient.invalidateQueries({ queryKey: ['profiles'] });
       setLocalEdits({});
       setRawJsonEdits(null);
-      toast.success('Settings saved');
+      toast.success(i18n.t('commonToast.settingsSaved'));
     },
     onError: (error: Error) => {
       if (error.message === 'CONFLICT') setConflictDialog(true);
@@ -158,12 +159,12 @@ export function ProfileEditor({
     },
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['profiles'] });
-      toast.success('Default target updated');
+      toast.success(i18n.t('commonToast.defaultTargetUpdated'));
     },
     onError: (error: Error, target: CliTarget) => {
       const targetLabel = target === 'droid' ? 'Factory Droid' : 'Claude Code';
       const suffix = error.message.trim() ? `: ${error.message}` : '';
-      toast.error(`Failed to update default target to ${targetLabel}${suffix}`);
+      toast.error(i18n.t('commonToast.failedUpdateDefaultTarget', { target: targetLabel, suffix }));
     },
   });
 

ui/src/components/profiles/editor/info-section.tsx

@@ -3,6 +3,7 @@
  * Displays profile information and usage commands
  */
 
+import { useTranslation } from 'react-i18next';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { Label } from '@/components/ui/label';
 import { CopyButton } from '@/components/ui/copy-button';
@@ -17,6 +18,7 @@ interface InfoSectionProps {
 }
 
 export function InfoSection({ profileName, target, data }: InfoSectionProps) {
+  const { t } = useTranslation();
   const isDroidTarget = target === 'droid';
 
   return (
@@ -26,17 +28,21 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
         <div>
           <h3 className="text-sm font-medium flex items-center gap-2 mb-3">
             <Info className="w-4 h-4" />
-            Profile Information
+            {t('profileEditor.profileInfo')}
           </h3>
           <div className="space-y-3 bg-card rounded-lg border p-4 shadow-sm">
             {data && (
               <>
                 <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                  <span className="font-medium text-muted-foreground">Profile Name</span>
+                  <span className="font-medium text-muted-foreground">
+                    {t('profileEditor.profileName')}
+                  </span>
                   <span className="font-mono">{data.profile}</span>
                 </div>
                 <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                  <span className="font-medium text-muted-foreground">File Path</span>
+                  <span className="font-medium text-muted-foreground">
+                    {t('profileEditor.filePath')}
+                  </span>
                   <div className="flex items-center gap-2 min-w-0">
                     <code className="bg-muted px-1.5 py-0.5 rounded text-xs break-all">
                       {data.path}
@@ -45,11 +51,15 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
                   </div>
                 </div>
                 <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                  <span className="font-medium text-muted-foreground">Last Modified</span>
+                  <span className="font-medium text-muted-foreground">
+                    {t('profileEditor.lastModified')}
+                  </span>
                   <span className="text-xs">{new Date(data.mtime).toLocaleString()}</span>
                 </div>
                 <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                  <span className="font-medium text-muted-foreground">Default Target</span>
+                  <span className="font-medium text-muted-foreground">
+                    {t('profileEditor.defaultTarget')}
+                  </span>
                   <span className="font-mono">{target}</span>
                 </div>
               </>
@@ -59,10 +69,12 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
 
         {/* Usage */}
         <div>
-          <h3 className="text-sm font-medium mb-3">Quick Usage</h3>
+          <h3 className="text-sm font-medium mb-3">{t('profileEditor.quickUsage')}</h3>
           <div className="space-y-3 bg-card rounded-lg border p-4 shadow-sm">
             <div>
-              <Label className="text-xs text-muted-foreground">Run with profile</Label>
+              <Label className="text-xs text-muted-foreground">
+                {t('profileEditor.runWithProfile')}
+              </Label>
               <div className="mt-1 flex gap-2">
                 <code className="flex-1 px-2 py-1.5 bg-muted rounded text-xs font-mono truncate">
                   ccs {profileName} "prompt"
@@ -72,7 +84,9 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
             </div>
             <div>
               <Label className="text-xs text-muted-foreground">
-                {isDroidTarget ? 'Droid alias (explicit)' : 'Run on Droid'}
+                {isDroidTarget
+                  ? t('profileEditor.droidAliasExplicit')
+                  : t('profileEditor.runOnDroid')}
               </Label>
               <div className="mt-1 flex gap-2">
                 <code className="flex-1 px-2 py-1.5 bg-muted rounded text-xs font-mono truncate">
@@ -93,7 +107,9 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
             </div>
             <div>
               <Label className="text-xs text-muted-foreground">
-                {isDroidTarget ? 'Override to Claude' : 'Override to Claude (explicit)'}
+                {isDroidTarget
+                  ? t('profileEditor.overrideToClaude')
+                  : t('profileEditor.overrideToClaudeExplicit')}
               </Label>
               <div className="mt-1 flex gap-2">
                 <code className="flex-1 px-2 py-1.5 bg-muted rounded text-xs font-mono truncate">
@@ -107,7 +123,9 @@ export function InfoSection({ profileName, target, data }: InfoSectionProps) {
               </div>
             </div>
             <div>
-              <Label className="text-xs text-muted-foreground">Set as default</Label>
+              <Label className="text-xs text-muted-foreground">
+                {t('profileEditor.setAsDefault')}
+              </Label>
               <div className="mt-1 flex gap-2">
                 <code className="flex-1 px-2 py-1.5 bg-muted rounded text-xs font-mono truncate">
                   ccs default {profileName}

ui/src/components/profiles/model-tier-mapping.tsx

@@ -12,6 +12,7 @@ import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/component
 import { useOpenRouterCatalog } from '@/hooks/use-openrouter-models';
 import { suggestTierMappings } from '@/lib/openrouter-utils';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 export interface TierMapping {
   opus?: string;
@@ -32,6 +33,7 @@ export function ModelTierMapping({
   onChange,
   className,
 }: ModelTierMappingProps) {
+  const { t } = useTranslation();
   const { models } = useOpenRouterCatalog();
 
   const suggestions = useMemo(() => {
@@ -53,18 +55,18 @@ export function ModelTierMapping({
     <Collapsible className={cn('group', className)}>
       <CollapsibleTrigger className="flex items-center gap-2 text-sm font-medium hover:underline">
         <ChevronRight className="h-4 w-4 transition-transform group-data-[state=open]:rotate-90" />
-        Model Tier Mapping
-        <span className="text-muted-foreground font-normal">(Advanced)</span>
+        {t('modelTierMapping.title')}
+        <span className="text-muted-foreground font-normal">
+          ({t('modelTierMapping.advanced')})
+        </span>
       </CollapsibleTrigger>
       <CollapsibleContent className="space-y-3 pt-3">
-        <p className="text-muted-foreground text-sm">
-          Configure different models for Claude Code&apos;s opus/sonnet/haiku tiers.
-        </p>
+        <p className="text-muted-foreground text-sm">{t('modelTierMapping.description')}</p>
 
         {hasSuggestions && (
           <Button type="button" variant="outline" size="sm" onClick={handleAutoSuggest}>
             <Wand2 className="mr-1 h-4 w-4" />
-            Auto-suggest based on {selectedModel?.split('/')[0]}
+            {t('modelTierMapping.autoSuggest', { provider: selectedModel?.split('/')[0] })}
           </Button>
         )}
 
@@ -77,7 +79,7 @@ export function ModelTierMapping({
               id="tier-opus"
               value={value.opus ?? ''}
               onChange={(e) => updateTier('opus', e.target.value)}
-              placeholder="e.g., anthropic/claude-opus-4"
+              placeholder={t('modelTierMapping.opusPlaceholder')}
             />
           </div>
           <div className="grid grid-cols-[80px_1fr] items-center gap-2">
@@ -88,7 +90,7 @@ export function ModelTierMapping({
               id="tier-sonnet"
               value={value.sonnet ?? ''}
               onChange={(e) => updateTier('sonnet', e.target.value)}
-              placeholder="e.g., anthropic/claude-sonnet-4"
+              placeholder={t('modelTierMapping.sonnetPlaceholder')}
             />
           </div>
           <div className="grid grid-cols-[80px_1fr] items-center gap-2">
@@ -99,15 +101,12 @@ export function ModelTierMapping({
               id="tier-haiku"
               value={value.haiku ?? ''}
               onChange={(e) => updateTier('haiku', e.target.value)}
-              placeholder="e.g., anthropic/claude-3.5-haiku"
+              placeholder={t('modelTierMapping.haikuPlaceholder')}
             />
           </div>
         </div>
 
-        <p className="text-muted-foreground text-xs">
-          These set ANTHROPIC_DEFAULT_OPUS_MODEL, ANTHROPIC_DEFAULT_SONNET_MODEL,
-          ANTHROPIC_DEFAULT_HAIKU_MODEL.
-        </p>
+        <p className="text-muted-foreground text-xs">{t('modelTierMapping.footer')}</p>
       </CollapsibleContent>
     </Collapsible>
   );

ui/src/components/profiles/openrouter-quick-start.tsx

@@ -9,6 +9,7 @@ import { Badge } from '@/components/ui/badge';
 import { Separator } from '@/components/ui/separator';
 import { useOpenRouterReady } from '@/hooks/use-openrouter-models';
 import { Sparkles, ExternalLink, ArrowRight, Zap } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface OpenRouterQuickStartProps {
   onOpenRouterClick: () => void;
@@ -19,6 +20,7 @@ export function OpenRouterQuickStart({
   onOpenRouterClick,
   onCustomClick,
 }: OpenRouterQuickStartProps) {
+  const { t } = useTranslation();
   const { modelCount, isLoading } = useOpenRouterReady();
 
   return (
@@ -35,13 +37,14 @@ export function OpenRouterQuickStart({
                 variant="secondary"
                 className="bg-accent/10 text-accent dark:bg-accent/20 dark:text-accent-foreground"
               >
-                Recommended
+                {t('openrouterQuickStart.recommended')}
               </Badge>
             </div>
-            <CardTitle className="text-xl">Start with OpenRouter</CardTitle>
+            <CardTitle className="text-xl">{t('openrouterQuickStart.title')}</CardTitle>
             <CardDescription className="text-base">
-              Access {isLoading ? '300+' : `${modelCount}+`} models from OpenAI, Anthropic, Google,
-              Meta and more - all through one API.
+              {t('openrouterQuickStart.description', {
+                modelCountLabel: isLoading ? '300+' : `${modelCount}+`,
+              })}
             </CardDescription>
           </CardHeader>
           <CardContent className="space-y-4">
@@ -49,11 +52,11 @@ export function OpenRouterQuickStart({
             <div className="grid grid-cols-2 gap-3 text-sm">
               <div className="flex items-center gap-2 text-muted-foreground">
                 <Zap className="w-4 h-4 text-accent" />
-                <span>One API, all providers</span>
+                <span>{t('openrouterQuickStart.featureOneApi')}</span>
               </div>
               <div className="flex items-center gap-2 text-muted-foreground">
                 <Sparkles className="w-4 h-4 text-accent" />
-                <span>Model tier mapping</span>
+                <span>{t('openrouterQuickStart.featureTierMapping')}</span>
               </div>
             </div>
 
@@ -62,12 +65,12 @@ export function OpenRouterQuickStart({
               className="w-full bg-accent hover:bg-accent/90 text-white"
               size="lg"
             >
-              Create OpenRouter Profile
+              {t('openrouterQuickStart.createOpenRouterProfile')}
               <ArrowRight className="w-4 h-4 ml-2" />
             </Button>
 
             <p className="text-xs text-center text-muted-foreground">
-              Get your API key at{' '}
+              {t('openrouterQuickStart.getApiKeyAt')}{' '}
               <a
                 href="https://openrouter.ai/keys"
                 target="_blank"
@@ -84,13 +87,13 @@ export function OpenRouterQuickStart({
         {/* Divider */}
         <div className="flex items-center gap-4">
           <Separator className="flex-1" />
-          <span className="text-xs text-muted-foreground">or</span>
+          <span className="text-xs text-muted-foreground">{t('openrouterQuickStart.or')}</span>
           <Separator className="flex-1" />
         </div>
 
         {/* Custom Option */}
         <Button variant="outline" onClick={onCustomClick} className="w-full">
-          Create Custom API Profile
+          {t('openrouterQuickStart.createCustomProfile')}
         </Button>
       </div>
     </div>

ui/src/components/profiles/profile-create-dialog.tsx

@@ -32,6 +32,7 @@ import { Badge } from '@/components/ui/badge';
 import { useCreateProfile } from '@/hooks/use-profiles';
 import { useOpenRouterCatalog } from '@/hooks/use-openrouter-models';
 import { Loader2, Plus, AlertTriangle, Info, Eye, EyeOff, Settings2, Sparkles } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { toast } from 'sonner';
 import { cn } from '@/lib/utils';
 import {
@@ -49,6 +50,7 @@ import {
 } from '@/lib/openrouter-utils';
 import type { CategorizedModel } from '@/lib/openrouter-types';
 import type { CliTarget } from '@/lib/api-client';
+import i18n from '@/lib/i18n';
 
 const schema = z.object({
   name: z
@@ -104,6 +106,7 @@ export function ProfileCreateDialog({
   onSuccess,
   initialMode = 'openrouter',
 }: ProfileCreateDialogProps) {
+  const { t } = useTranslation();
   const createMutation = useCreateProfile();
   const [activeTab, setActiveTab] = useState('basic');
   const [urlWarning, setUrlWarning] = useState<string | null>(null);
@@ -242,7 +245,7 @@ export function ProfileCreateDialog({
   const onSubmit = async (data: FormData) => {
     // Validate API key - required unless preset has requiresApiKey: false
     if (currentPreset?.requiresApiKey !== false && !data.apiKey) {
-      toast.error('API key is required');
+      toast.error(i18n.t('commonToast.apiKeyRequired'));
       return;
     }
     // Use user-provided baseUrl (allows customization of preset URLs)
@@ -290,7 +293,9 @@ export function ProfileCreateDialog({
           <div className="px-6 py-3 border-b bg-muted/30 space-y-2">
             {/* Main Options: OpenRouter + Custom */}
             <div>
-              <Label className="text-xs text-muted-foreground mb-1.5 block">Provider</Label>
+              <Label className="text-xs text-muted-foreground mb-1.5 block">
+                {t('profileEditor.provider')}
+              </Label>
               <div className="flex gap-2">
                 {RECOMMENDED_PRESETS.map((preset) => (
                   <CompactPresetCard
@@ -312,7 +317,7 @@ export function ProfileCreateDialog({
                   )}
                 >
                   <Settings2 className="w-4 h-4" />
-                  <span>Custom</span>
+                  <span>{t('profileEditor.custom')}</span>
                 </button>
               </div>
             </div>

ui/src/components/profiles/profile-dialog.tsx

@@ -16,6 +16,7 @@ import { Label } from '@/components/ui/label';
 import { useCreateProfile, useUpdateProfile } from '@/hooks/use-profiles';
 import type { Profile } from '@/lib/api-client';
 import { ChevronDown, ChevronRight } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 const DEFAULT_MODEL = 'claude-sonnet-4-5-20250929';
 
@@ -41,6 +42,7 @@ interface ProfileDialogProps {
 }
 
 export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
+  const { t } = useTranslation();
   const createMutation = useCreateProfile();
   const updateMutation = useUpdateProfile();
   const [showModelMapping, setShowModelMapping] = useState(false);
@@ -115,34 +117,45 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
     <Dialog open={open} onOpenChange={onClose}>
       <DialogContent className="max-w-md">
         <DialogHeader>
-          <DialogTitle>{profile ? 'Edit Profile' : 'Create API Profile'}</DialogTitle>
+          <DialogTitle>
+            {profile ? t('profileDialog.editTitle') : t('profileDialog.createTitle')}
+          </DialogTitle>
         </DialogHeader>
         <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
           <div>
-            <Label htmlFor="name">Name</Label>
-            <Input id="name" {...register('name')} placeholder="my-api" disabled={!!profile} />
+            <Label htmlFor="name">{t('profileDialog.name')}</Label>
+            <Input
+              id="name"
+              {...register('name')}
+              placeholder={t('profileDialog.namePlaceholder')}
+              disabled={!!profile}
+            />
             {errors.name && <span className="text-xs text-red-500">{errors.name.message}</span>}
           </div>
 
           <div>
-            <Label htmlFor="baseUrl">Base URL</Label>
-            <Input id="baseUrl" {...register('baseUrl')} placeholder="https://api.example.com" />
+            <Label htmlFor="baseUrl">{t('profileDialog.baseUrl')}</Label>
+            <Input
+              id="baseUrl"
+              {...register('baseUrl')}
+              placeholder={t('profileDialog.baseUrlPlaceholder')}
+            />
             {errors.baseUrl && (
               <span className="text-xs text-red-500">{errors.baseUrl.message}</span>
             )}
           </div>
 
           <div>
-            <Label htmlFor="apiKey">API Key</Label>
+            <Label htmlFor="apiKey">{t('profileDialog.apiKey')}</Label>
             <Input id="apiKey" type="password" {...register('apiKey')} />
             {errors.apiKey && <span className="text-xs text-red-500">{errors.apiKey.message}</span>}
           </div>
 
           <div>
-            <Label htmlFor="model">Default Model (ANTHROPIC_MODEL)</Label>
+            <Label htmlFor="model">{t('profileDialog.defaultModel')}</Label>
             <Input id="model" {...register('model')} placeholder={DEFAULT_MODEL} />
             <p className="text-xs text-muted-foreground mt-1">
-              Leave blank to use: {DEFAULT_MODEL}
+              {t('profileDialog.defaultModelHint', { model: DEFAULT_MODEL })}
             </p>
           </div>
 
@@ -153,7 +166,7 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
               className="w-full flex items-center justify-between p-3 text-sm font-medium hover:bg-muted/50 transition-colors"
               onClick={() => setShowModelMapping(!showModelMapping)}
             >
-              <span>Model Mapping (Opus/Sonnet/Haiku)</span>
+              <span>{t('profileDialog.modelMappingTitle')}</span>
               {showModelMapping ? (
                 <ChevronDown className="w-4 h-4" />
               ) : (
@@ -164,13 +177,12 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
             {showModelMapping && (
               <div className="p-3 pt-0 space-y-3 border-t">
                 <p className="text-xs text-muted-foreground">
-                  Configure different model IDs for each tier. Useful for API proxies that route
-                  different model types to different backends.
+                  {t('profileDialog.modelMappingDesc')}
                 </p>
 
                 <div>
                   <Label htmlFor="opusModel" className="text-xs">
-                    Opus Model (ANTHROPIC_DEFAULT_OPUS_MODEL)
+                    {t('profileDialog.opusModel')}
                   </Label>
                   <Input
                     id="opusModel"
@@ -182,7 +194,7 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
 
                 <div>
                   <Label htmlFor="sonnetModel" className="text-xs">
-                    Sonnet Model (ANTHROPIC_DEFAULT_SONNET_MODEL)
+                    {t('profileDialog.sonnetModel')}
                   </Label>
                   <Input
                     id="sonnetModel"
@@ -194,7 +206,7 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
 
                 <div>
                   <Label htmlFor="haikuModel" className="text-xs">
-                    Haiku Model (ANTHROPIC_DEFAULT_HAIKU_MODEL)
+                    {t('profileDialog.haikuModel')}
                   </Label>
                   <Input
                     id="haikuModel"
@@ -209,14 +221,14 @@ export function ProfileDialog({ open, onClose, profile }: ProfileDialogProps) {
 
           <div className="flex justify-end gap-2 pt-2">
             <Button type="button" variant="outline" onClick={onClose}>
-              Cancel
+              {t('profileDialog.cancel')}
             </Button>
             <Button type="submit" disabled={createMutation.isPending || updateMutation.isPending}>
               {createMutation.isPending || updateMutation.isPending
-                ? 'Saving...'
+                ? t('profileDialog.saving')
                 : profile
-                  ? 'Update'
-                  : 'Create'}
+                  ? t('profileDialog.update')
+                  : t('profileDialog.create')}
             </Button>
           </div>
         </form>

ui/src/components/setup/wizard/index.tsx

@@ -24,6 +24,7 @@ import {
 import type { AuthStatus, OAuthAccount } from '@/lib/api-client';
 import type { CLIProxyProvider } from '@/lib/provider-config';
 import { applyDefaultPreset } from '@/lib/preset-utils';
+import i18n from '@/lib/i18n';
 import { usePrivacy } from '@/contexts/privacy-context';
 import { toast } from 'sonner';
 
@@ -100,7 +101,7 @@ export function QuickSetupWizard({ open, onClose }: QuickSetupWizardProps) {
             if (result.success && result.presetName) {
               toast.success(`Applied "${result.presetName}" preset`);
             } else if (!result.success) {
-              toast.warning('Account added, but failed to apply default preset');
+              toast.warning(i18n.t('commonToast.accountAddedPresetFailed'));
             }
           }
 

ui/src/components/setup/wizard/steps/variant-step.tsx

@@ -18,6 +18,7 @@ import { cn } from '@/lib/utils';
 import { PRIVACY_BLUR_CLASS } from '@/contexts/privacy-context';
 import { MODEL_CATALOGS } from '@/lib/model-catalogs';
 import type { VariantStepProps } from '../types';
+import { useTranslation } from 'react-i18next';
 
 const CUSTOM_MODEL_VALUE = '__custom__';
 
@@ -34,6 +35,7 @@ export function VariantStep({
   onSkip,
   onCreate,
 }: VariantStepProps) {
+  const { t } = useTranslation();
   // Track if user selected custom model option
   const catalogModels = MODEL_CATALOGS[selectedProvider]?.models || [];
   const isCustomModel = modelName && !catalogModels.some((m) => m.id === modelName);
@@ -55,7 +57,7 @@ export function VariantStep({
         <div className="flex items-center gap-2 p-2 bg-muted/50 rounded-md text-sm">
           <User className="w-4 h-4" />
           <span>
-            Using:{' '}
+            {t('setupVariant.using')}{' '}
             <span className={cn(privacyMode && PRIVACY_BLUR_CLASS)}>
               {selectedAccount.email || selectedAccount.id}
             </span>
@@ -64,33 +66,33 @@ export function VariantStep({
       )}
 
       <div className="space-y-2">
-        <Label htmlFor="variant-name">Variant Name *</Label>
+        <Label htmlFor="variant-name">{t('setupVariant.variantNameRequired')}</Label>
         <Input
           id="variant-name"
           value={variantName}
           onChange={(e) => onVariantNameChange(e.target.value)}
-          placeholder="e.g., my-gemini, g3, flash"
+          placeholder={t('setupVariant.variantNamePlaceholder')}
         />
         <div className="text-xs text-muted-foreground">
-          Use this name to invoke: ccs {variantName || '<name>'} "prompt"
+          {t('setupVariant.invokeHintPrefix')} ccs {variantName || '<name>'} "prompt"
         </div>
       </div>
 
       <div className="space-y-2">
-        <Label>Model</Label>
+        <Label>{t('setupVariant.model')}</Label>
         {showCustomInput ? (
           <div className="space-y-2">
             <Input
               value={modelName}
               onChange={(e) => onModelChange(e.target.value)}
-              placeholder="e.g., gemini-2.5-pro, claude-opus-4-5"
+              placeholder={t('setupVariant.modelPlaceholder')}
             />
             <button
               type="button"
               className="text-xs text-primary hover:underline"
               onClick={() => setShowCustomInput(false)}
             >
-              Choose from presets instead
+              {t('setupVariant.choosePresetInstead')}
             </button>
           </div>
         ) : (
@@ -99,7 +101,7 @@ export function VariantStep({
             onValueChange={handleModelSelect}
           >
             <SelectTrigger>
-              <SelectValue placeholder="Select a model" />
+              <SelectValue placeholder={t('setupVariant.selectModel')} />
             </SelectTrigger>
             <SelectContent>
               {catalogModels.map((m) => (
@@ -113,35 +115,37 @@ export function VariantStep({
                 </SelectItem>
               ))}
               <SelectItem value={CUSTOM_MODEL_VALUE}>
-                <span className="text-primary">Custom model name...</span>
+                <span className="text-primary">{t('setupVariant.customModelName')}</span>
               </SelectItem>
             </SelectContent>
           </Select>
         )}
         <div className="text-xs text-muted-foreground">
           {showCustomInput
-            ? 'Enter any model name supported by CLIProxy'
-            : `Default: ${MODEL_CATALOGS[selectedProvider]?.defaultModel || 'provider default'}`}
+            ? t('setupVariant.enterAnyModel')
+            : t('setupVariant.defaultModel', {
+                model:
+                  MODEL_CATALOGS[selectedProvider]?.defaultModel ||
+                  t('setupVariant.providerDefault'),
+              })}
         </div>
       </div>
 
       <div className="flex items-center justify-between pt-2">
         <Button variant="ghost" onClick={onBack}>
           <ArrowLeft className="w-4 h-4 mr-2" />
-          Back
+          {t('setupVariant.back')}
         </Button>
         <div className="flex items-center gap-2">
           <Button variant="ghost" onClick={onSkip}>
-            Skip
+            {t('setupVariant.skip')}
           </Button>
           <Button onClick={onCreate} disabled={!variantName || isPending}>
-            {isPending ? 'Creating...' : 'Create Variant'}
+            {isPending ? t('setupVariant.creating') : t('setupVariant.createVariant')}
           </Button>
         </div>
       </div>
-      <p className="text-xs text-center text-muted-foreground">
-        Skip if you just wanted to add an account without creating a variant
-      </p>
+      <p className="text-xs text-center text-muted-foreground">{t('setupVariant.skipHint')}</p>
     </div>
   );
 }

ui/src/components/shared/device-code-dialog.tsx

@@ -21,6 +21,7 @@ import {
   getDeviceCodeProviderDisplayName,
   getDeviceCodeProviderInstruction,
 } from '@/lib/provider-config';
+import i18n from '@/lib/i18n';
 
 interface DeviceCodeDialogProps {
   open: boolean;
@@ -72,10 +73,10 @@ export function DeviceCodeDialog({
     try {
       await navigator.clipboard.writeText(userCode);
       setHasCopied(true);
-      toast.success('Code copied to clipboard');
+      toast.success(i18n.t('commonToast.codeCopied'));
       setTimeout(() => setHasCopied(false), 2000);
     } catch {
-      toast.error('Failed to copy code');
+      toast.error(i18n.t('commonToast.copyCodeFailed'));
     }
   }, [userCode]);
 

ui/src/components/shared/settings-dialog.tsx

@@ -20,6 +20,7 @@ import { MaskedInput } from '@/components/ui/masked-input';
 import { ConfirmDialog } from './confirm-dialog';
 import { Save, X, Loader2, Code2 } from 'lucide-react';
 import { toast } from 'sonner';
+import i18n from '@/lib/i18n';
 
 // Lazy load CodeEditor to reduce initial bundle size
 const CodeEditor = lazy(() => import('./code-editor').then((m) => ({ default: m.CodeEditor })));
@@ -154,7 +155,7 @@ function SettingsDialogContent({
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['settings', profileName] });
       queryClient.invalidateQueries({ queryKey: ['profiles'] });
-      toast.success('Settings saved');
+      toast.success(i18n.t('commonToast.settingsSaved'));
       onClose();
     },
     onError: (error: Error) => {

ui/src/components/updates/notice-progress-badge.tsx

@@ -1,33 +1,7 @@
 import { Badge } from '@/components/ui/badge';
 import { cn } from '@/lib/utils';
 import { type NoticeProgressState } from '@/lib/updates-notice-state';
-
-const NOTICE_PROGRESS_META: Record<
-  NoticeProgressState,
-  { label: string; className: string; showDot?: boolean }
-> = {
-  new: {
-    label: 'Needs Action',
-    className:
-      'border-amber-300/70 bg-amber-100/70 text-amber-800 dark:border-amber-500/40 dark:bg-amber-500/15 dark:text-amber-300',
-    showDot: true,
-  },
-  seen: {
-    label: 'In Review',
-    className:
-      'border-blue-300/70 bg-blue-100/70 text-blue-800 dark:border-blue-500/40 dark:bg-blue-500/15 dark:text-blue-300',
-  },
-  done: {
-    label: 'Done',
-    className:
-      'border-emerald-300/70 bg-emerald-100/70 text-emerald-800 dark:border-emerald-500/40 dark:bg-emerald-500/15 dark:text-emerald-300',
-  },
-  dismissed: {
-    label: 'Dismissed',
-    className:
-      'border-muted-foreground/20 bg-muted text-muted-foreground dark:border-muted-foreground/30',
-  },
-};
+import { useTranslation } from 'react-i18next';
 
 export function NoticeProgressBadge({
   state,
@@ -36,7 +10,30 @@ export function NoticeProgressBadge({
   state: NoticeProgressState;
   className?: string;
 }) {
-  const meta = NOTICE_PROGRESS_META[state];
+  const { t } = useTranslation();
+  const meta = {
+    new: {
+      label: t('updates.progressNeedsAction'),
+      className:
+        'border-amber-300/70 bg-amber-100/70 text-amber-800 dark:border-amber-500/40 dark:bg-amber-500/15 dark:text-amber-300',
+      showDot: true,
+    },
+    seen: {
+      label: t('updates.progressInReview'),
+      className:
+        'border-blue-300/70 bg-blue-100/70 text-blue-800 dark:border-blue-500/40 dark:bg-blue-500/15 dark:text-blue-300',
+    },
+    done: {
+      label: t('updates.progressDone'),
+      className:
+        'border-emerald-300/70 bg-emerald-100/70 text-emerald-800 dark:border-emerald-500/40 dark:bg-emerald-500/15 dark:text-emerald-300',
+    },
+    dismissed: {
+      label: t('updates.progressDismissed'),
+      className:
+        'border-muted-foreground/20 bg-muted text-muted-foreground dark:border-muted-foreground/30',
+    },
+  }[state] as { label: string; className: string; showDot?: boolean };
 
   return (
     <Badge

ui/src/components/updates/support-entry-card.tsx

@@ -8,12 +8,7 @@ import {
   type SupportScope,
 } from '@/lib/support-updates-catalog';
 import { SupportStatusBadge } from './support-status-badge';
-
-const PILLAR_LABELS: { key: keyof CliSupportEntry['pillars']; label: string }[] = [
-  { key: 'baseUrl', label: 'Base URL' },
-  { key: 'auth', label: 'Auth' },
-  { key: 'model', label: 'Model' },
-];
+import { useTranslation } from 'react-i18next';
 
 const SCOPE_STYLES: Record<SupportScope, string> = {
   target:
@@ -27,6 +22,13 @@ const SCOPE_STYLES: Record<SupportScope, string> = {
 };
 
 export function SupportEntryCard({ entry }: { entry: CliSupportEntry }) {
+  const { t } = useTranslation();
+  const pillarLabels: { key: keyof CliSupportEntry['pillars']; label: string }[] = [
+    { key: 'baseUrl', label: 'Base URL' },
+    { key: 'auth', label: 'Auth' },
+    { key: 'model', label: 'Model' },
+  ];
+
   return (
     <Card className="h-full gap-4">
       <CardHeader className="gap-3">
@@ -45,7 +47,7 @@ export function SupportEntryCard({ entry }: { entry: CliSupportEntry }) {
 
       <CardContent className="space-y-4">
         <div className="grid gap-2 sm:grid-cols-3">
-          {PILLAR_LABELS.map((pillar) => (
+          {pillarLabels.map((pillar) => (
             <div key={pillar.key} className="rounded-md border bg-muted/30 p-2">
               <p className="text-[10px] uppercase tracking-wide text-muted-foreground">
                 {pillar.label}
@@ -57,7 +59,7 @@ export function SupportEntryCard({ entry }: { entry: CliSupportEntry }) {
 
         <div className="space-y-1">
           <p className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
-            Dashboard
+            {t('updates.dashboard')}
           </p>
           <div className="flex flex-wrap gap-2">
             {entry.routes.map((route) => (
@@ -75,7 +77,7 @@ export function SupportEntryCard({ entry }: { entry: CliSupportEntry }) {
 
         <div className="space-y-1">
           <p className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
-            CLI Usage
+            {t('updates.cliUsage')}
           </p>
           <div className="space-y-1">
             {entry.commands.slice(0, 2).map((command) => (

ui/src/components/updates/support-status-badge.tsx

@@ -1,12 +1,7 @@
 import { Badge } from '@/components/ui/badge';
 import { cn } from '@/lib/utils';
 import type { SupportStatus } from '@/lib/support-updates-catalog';
-
-const STATUS_LABELS: Record<SupportStatus, string> = {
-  new: 'New',
-  stable: 'Stable',
-  planned: 'Planned',
-};
+import { useTranslation } from 'react-i18next';
 
 const STATUS_STYLES: Record<SupportStatus, string> = {
   new: 'border-blue-200 bg-blue-50 text-blue-700 dark:border-blue-900/50 dark:bg-blue-900/20 dark:text-blue-300',
@@ -23,9 +18,16 @@ export function SupportStatusBadge({
   status: SupportStatus;
   className?: string;
 }) {
+  const { t } = useTranslation();
+  const labels: Record<SupportStatus, string> = {
+    new: t('updates.statusNew'),
+    stable: t('updates.statusStable'),
+    planned: t('updates.statusPlanned'),
+  };
+
   return (
     <Badge variant="outline" className={cn('font-medium', STATUS_STYLES[status], className)}>
-      {STATUS_LABELS[status]}
+      {labels[status]}
     </Badge>
   );
 }

ui/src/components/updates/updates-details-panel.tsx

@@ -15,6 +15,7 @@ import {
   type SupportNotice,
 } from '@/lib/support-updates-catalog';
 import { type NoticeProgressState } from '@/lib/updates-notice-state';
+import { useTranslation } from 'react-i18next';
 
 type UpdatableNoticeProgress = 'new' | 'seen' | 'done' | 'dismissed';
 
@@ -29,10 +30,11 @@ export function UpdatesDetailsPanel({
   relatedEntries: CliSupportEntry[];
   onUpdateProgress: (nextState: UpdatableNoticeProgress) => void;
 }) {
+  const { t } = useTranslation();
   if (!notice) {
     return (
       <div className="flex h-full items-center justify-center rounded-lg border border-dashed bg-muted/20 p-6">
-        <p className="text-sm text-muted-foreground">No updates available.</p>
+        <p className="text-sm text-muted-foreground">{t('updates.noUpdates')}</p>
       </div>
     );
   }
@@ -53,21 +55,21 @@ export function UpdatesDetailsPanel({
 
         <div className="mt-2 flex flex-wrap items-center gap-2 text-xs text-muted-foreground">
           <CalendarClock className="h-3.5 w-3.5" />
-          <span>Published {formatCatalogDate(notice.publishedAt)}</span>
+          <span>{t('updates.published', { date: formatCatalogDate(notice.publishedAt) })}</span>
         </div>
 
         <div className="mt-3 flex flex-wrap gap-2">
           <Button size="sm" onClick={() => onUpdateProgress('done')}>
             <CheckCircle2 className="h-4 w-4" />
-            Mark done
+            {t('updates.markDone')}
           </Button>
           <Button size="sm" variant="outline" onClick={() => onUpdateProgress('dismissed')}>
             <EyeOff className="h-4 w-4" />
-            Dismiss
+            {t('updates.dismiss')}
           </Button>
           <Button size="sm" variant="ghost" onClick={() => onUpdateProgress('new')}>
             <RotateCcw className="h-4 w-4" />
-            Reopen
+            {t('updates.reopen')}
           </Button>
         </div>
       </div>
@@ -78,7 +80,7 @@ export function UpdatesDetailsPanel({
             <CardHeader className="pb-3">
               <div className="flex items-center gap-2">
                 <Sparkles className="h-4 w-4 text-primary" />
-                <CardTitle className="text-base">Do Next</CardTitle>
+                <CardTitle className="text-base">{t('updates.doNext')}</CardTitle>
               </div>
               <CardDescription>{notice.primaryAction}</CardDescription>
             </CardHeader>
@@ -96,8 +98,8 @@ export function UpdatesDetailsPanel({
           <div className="grid h-full grid-rows-[minmax(0,1fr)_minmax(0,1fr)] gap-4 overflow-hidden">
             <Card className="overflow-hidden">
               <CardHeader className="pb-3">
-                <CardTitle className="text-base">Impacted Integrations</CardTitle>
-                <CardDescription>Related areas based on update scope and routing.</CardDescription>
+                <CardTitle className="text-base">{t('updates.impactedIntegrations')}</CardTitle>
+                <CardDescription>{t('updates.impactedDesc')}</CardDescription>
               </CardHeader>
               <CardContent className="min-h-0">
                 <ScrollArea className="h-full pr-2">
@@ -134,10 +136,8 @@ export function UpdatesDetailsPanel({
 
             <Card className="overflow-hidden">
               <CardHeader className="pb-3">
-                <CardTitle className="text-base">Why It Matters</CardTitle>
-                <CardDescription>
-                  Short context only, no wall-of-text release notes.
-                </CardDescription>
+                <CardTitle className="text-base">{t('updates.whyMatters')}</CardTitle>
+                <CardDescription>{t('updates.whyMattersDesc')}</CardDescription>
               </CardHeader>
               <CardContent className="min-h-0">
                 <ScrollArea className="h-full pr-2">

ui/src/components/updates/updates-notice-action-row.tsx

@@ -3,8 +3,10 @@ import { ArrowUpRight, Terminal } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { CopyButton } from '@/components/ui/copy-button';
 import { type SupportNoticeAction } from '@/lib/support-updates-catalog';
+import { useTranslation } from 'react-i18next';
 
 export function UpdatesNoticeActionRow({ action }: { action: SupportNoticeAction }) {
+  const { t } = useTranslation();
   return (
     <div className="rounded-md border bg-muted/20 p-3">
       <div className="flex items-start justify-between gap-3">
@@ -16,7 +18,7 @@ export function UpdatesNoticeActionRow({ action }: { action: SupportNoticeAction
         {action.type === 'route' && action.path && (
           <Button size="sm" asChild>
             <Link to={action.path}>
-              Open
+              {t('updates.open')}
               <ArrowUpRight className="h-3.5 w-3.5" />
             </Link>
           </Button>

ui/src/lib/error-log-parser.ts

@@ -1,3 +1,5 @@
+import { getFormattingLocale } from '@/lib/locales';
+
 /**
  * Error Log Parser Utility
  *
@@ -394,7 +396,9 @@ function getStatusText(code: number): string {
 /**
  * Format Unix timestamp (seconds) to relative time string
  */
-export function formatRelativeTime(modifiedSeconds: number): string {
+export function formatRelativeTime(modifiedSeconds: number, locale?: string): string {
+  const formatLocale = getFormattingLocale(locale);
+  const isZh = formatLocale === 'zh-CN';
   const now = Date.now();
   const modified = modifiedSeconds * 1000; // Convert to milliseconds
   const diff = now - modified;
@@ -404,14 +408,14 @@ export function formatRelativeTime(modifiedSeconds: number): string {
   const hours = Math.floor(minutes / 60);
   const days = Math.floor(hours / 24);
 
-  if (seconds < 60) return 'just now';
-  if (minutes < 60) return `${minutes}m ago`;
-  if (hours < 24) return `${hours}h ago`;
-  if (days < 7) return `${days}d ago`;
+  if (seconds < 60) return isZh ? '刚刚' : 'just now';
+  if (minutes < 60) return isZh ? `${minutes} 分钟前` : `${minutes}m ago`;
+  if (hours < 24) return isZh ? `${hours} 小时前` : `${hours}h ago`;
+  if (days < 7) return isZh ? `${days} 天前` : `${days}d ago`;
 
   // Format as date for older logs
   const date = new Date(modified);
-  return date.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
+  return date.toLocaleDateString(formatLocale, { month: 'short', day: 'numeric' });
 }
 
 /**
@@ -436,16 +440,26 @@ export function getStatusColor(code: number): string {
 /**
  * Get error type label
  */
-export function getErrorTypeLabel(type: ParsedErrorLog['errorType']): string {
-  const labels: Record<string, string> = {
-    rate_limit: 'Rate Limited',
-    auth: 'Auth Error',
-    not_found: 'Not Found',
-    server: 'Server Error',
-    timeout: 'Timeout',
-    unknown: 'Error',
-  };
-  return labels[type] || 'Error';
+export function getErrorTypeLabel(type: ParsedErrorLog['errorType'], locale?: string): string {
+  const isZh = getFormattingLocale(locale) === 'zh-CN';
+  const labels: Record<string, string> = isZh
+    ? {
+        rate_limit: '限流',
+        auth: '认证错误',
+        not_found: '未找到',
+        server: '服务错误',
+        timeout: '超时',
+        unknown: '错误',
+      }
+    : {
+        rate_limit: 'Rate Limited',
+        auth: 'Auth Error',
+        not_found: 'Not Found',
+        server: 'Server Error',
+        timeout: 'Timeout',
+        unknown: 'Error',
+      };
+  return labels[type] || (isZh ? '错误' : 'Error');
 }
 
 /**
@@ -467,22 +481,27 @@ export function formatQuotaResetDelay(seconds: number | null): string | null {
 /**
  * Format quota reset timestamp as relative time
  */
-export function formatQuotaResetTimestamp(timestamp: string | null): string | null {
+export function formatQuotaResetTimestamp(
+  timestamp: string | null,
+  locale?: string
+): string | null {
   if (!timestamp) return null;
+  const isZh = getFormattingLocale(locale) === 'zh-CN';
   try {
     const resetDate = new Date(timestamp);
     const now = new Date();
     const diff = resetDate.getTime() - now.getTime();
-    if (diff <= 0) return 'now';
+    if (diff <= 0) return isZh ? '现在' : 'now';
 
     const seconds = Math.floor(diff / 1000);
-    if (seconds < 60) return `${seconds}s`;
+    if (seconds < 60) return isZh ? `${seconds}秒` : `${seconds}s`;
     if (seconds < 3600) {
       const mins = Math.floor(seconds / 60);
-      return `${mins}m`;
+      return isZh ? `${mins}分钟` : `${mins}m`;
     }
     const hours = Math.floor(seconds / 3600);
     const mins = Math.floor((seconds % 3600) / 60);
+    if (isZh) return mins > 0 ? `${hours}小时 ${mins}分钟` : `${hours}小时`;
     return mins > 0 ? `${hours}h ${mins}m` : `${hours}h`;
   } catch {
     return null;

ui/src/lib/locales.ts

@@ -0,0 +1,52 @@
+export const LOCALE_STORAGE_KEY = 'ccs-ui-locale';
+
+export const SUPPORTED_LOCALES = ['en', 'zh-CN'] as const;
+
+export type AppLocale = (typeof SUPPORTED_LOCALES)[number];
+
+export function isSupportedLocale(locale: string): locale is AppLocale {
+  return SUPPORTED_LOCALES.includes(locale as AppLocale);
+}
+
+export function normalizeLocale(locale: string | null | undefined): AppLocale {
+  if (!locale) return 'en';
+  if (locale.toLowerCase().startsWith('zh')) return 'zh-CN';
+  return 'en';
+}
+
+export function getStoredLocale(): AppLocale | null {
+  if (typeof window === 'undefined') return null;
+  try {
+    const raw = window.localStorage.getItem(LOCALE_STORAGE_KEY);
+    return raw ? normalizeLocale(raw) : null;
+  } catch {
+    return null;
+  }
+}
+
+export function getInitialLocale(): AppLocale {
+  const stored = getStoredLocale();
+  if (stored) return stored;
+  if (typeof navigator !== 'undefined') return normalizeLocale(navigator.language);
+  return 'en';
+}
+
+export function getFormattingLocale(locale?: string): string {
+  if (locale) return normalizeLocale(locale);
+  const stored = getStoredLocale();
+  if (stored) return stored;
+  if (typeof navigator !== 'undefined') return normalizeLocale(navigator.language);
+  return 'en';
+}
+
+export function persistLocale(locale: string): AppLocale {
+  const normalized = normalizeLocale(locale);
+  if (typeof window !== 'undefined') {
+    try {
+      window.localStorage.setItem(LOCALE_STORAGE_KEY, normalized);
+    } catch {
+      // Ignore storage errors and keep runtime locale only.
+    }
+  }
+  return normalized;
+}

ui/src/pages/accounts.tsx

@@ -17,8 +17,10 @@ import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/component
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { useAccounts, useConfirmLegacyAccountPolicies } from '@/hooks/use-accounts';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 export function AccountsPage() {
+  const { t } = useTranslation();
   const navigate = useNavigate();
   const { data, isLoading } = useAccounts();
   const confirmLegacyMutation = useConfirmLegacyAccountPolicies();
@@ -59,12 +61,12 @@ export function AccountsPage() {
           <div className="p-4 border-b bg-background space-y-2">
             <div className="flex items-center gap-2">
               <Users className="h-5 w-5 text-primary" />
-              <h1 className="font-semibold">Accounts</h1>
+              <h1 className="font-semibold">{t('accountsPage.title')}</h1>
             </div>
             <p className="text-xs text-muted-foreground">
-              Manage
+              {t('accountsPage.managePrefix')}
               <code className="mx-1 rounded bg-muted px-1 py-0.5">ccs auth</code>
-              accounts and pool onboarding from one panel.
+              {t('accountsPage.manageSuffix')}
             </p>
           </div>
 
@@ -72,7 +74,7 @@ export function AccountsPage() {
             <div className="p-4 space-y-3">
               <div className="space-y-2">
                 <p className="text-[11px] font-medium uppercase tracking-wide text-muted-foreground">
-                  Primary Actions
+                  {t('accountsPage.primaryActions')}
                 </p>
                 <Button
                   size="sm"
@@ -80,7 +82,7 @@ export function AccountsPage() {
                   onClick={() => setCreateDialogOpen(true)}
                 >
                   <Plus className="w-4 h-4 mr-2" />
-                  Create Account
+                  {t('accountsPage.createAccount')}
                 </Button>
                 <Button
                   size="sm"
@@ -88,7 +90,7 @@ export function AccountsPage() {
                   onClick={handleOpenClaudePoolAuth}
                 >
                   <Zap className="w-4 h-4 mr-2" />
-                  Authenticate Claude in Pool
+                  {t('accountsPage.authClaudeInPool')}
                 </Button>
                 <Button
                   variant="outline"
@@ -96,7 +98,7 @@ export function AccountsPage() {
                   className="w-full justify-start"
                   onClick={handleOpenClaudePool}
                 >
-                  Open Claude Pool Settings
+                  {t('accountsPage.openClaudePoolSettings')}
                   <ArrowRight className="w-4 h-4 ml-auto" />
                 </Button>
               </div>
@@ -104,7 +106,7 @@ export function AccountsPage() {
               {hasLegacyFollowUp ? (
                 <section className="space-y-2">
                   <p className="text-[11px] font-medium uppercase tracking-wide text-muted-foreground">
-                    Migration Follow-up
+                    {t('accountsPage.migrationFollowup')}
                   </p>
                   <div className="rounded-md border border-amber-500/50 bg-amber-500/10 p-3 space-y-3">
                     <div className="flex items-start gap-2">
@@ -112,16 +114,14 @@ export function AccountsPage() {
                       <div className="space-y-1 text-xs">
                         {legacyContextCount > 0 && (
                           <p className="text-amber-800 dark:text-amber-300">
-                            {legacyContextCount} account
-                            {legacyContextCount > 1 ? 's still need' : ' still needs'} first-time
-                            mode confirmation.
+                            {t('accountsPage.legacyContextPending', { count: legacyContextCount })}
                           </p>
                         )}
                         {legacyContinuityCount > 0 && (
                           <p className="text-amber-800 dark:text-amber-300">
-                            {legacyContinuityCount} shared account
-                            {legacyContinuityCount > 1 ? 's remain' : ' remains'} on standard legacy
-                            continuity depth.
+                            {t('accountsPage.legacyContinuityPending', {
+                              count: legacyContinuityCount,
+                            })}
                           </p>
                         )}
                       </div>
@@ -134,14 +134,14 @@ export function AccountsPage() {
                       disabled={confirmLegacyMutation.isPending || legacyTargetCount === 0}
                     >
                       {confirmLegacyMutation.isPending
-                        ? 'Confirming Legacy Policies...'
-                        : `Confirm Legacy Policies (${legacyTargetCount})`}
+                        ? t('accountsPage.confirmingLegacy')
+                        : t('accountsPage.confirmLegacy', { count: legacyTargetCount })}
                     </Button>
                   </div>
                 </section>
               ) : (
                 <div className="rounded-md border bg-background px-3 py-2 text-xs text-muted-foreground">
-                  No legacy follow-up pending.
+                  {t('accountsPage.noLegacyFollowup')}
                 </div>
               )}
 
@@ -151,9 +151,11 @@ export function AccountsPage() {
                     <CollapsibleTrigger asChild>
                       <Button variant="ghost" className="h-auto w-full justify-between px-0 py-0">
                         <div className="text-left">
-                          <CardTitle className="text-sm">Continuity Guide</CardTitle>
+                          <CardTitle className="text-sm">
+                            {t('accountsPage.continuityGuide')}
+                          </CardTitle>
                           <CardDescription className="mt-1">
-                            Expand only when needed.
+                            {t('accountsPage.expandWhenNeeded')}
                           </CardDescription>
                         </div>
                         <ChevronDown
@@ -165,21 +167,26 @@ export function AccountsPage() {
                   <CollapsibleContent>
                     <CardContent className="space-y-3 text-xs text-muted-foreground">
                       <div className="rounded-md border p-2.5">
-                        <p className="font-semibold text-foreground">Shared Standard</p>
+                        <p className="font-semibold text-foreground">
+                          {t('accountsPage.sharedStandard')}
+                        </p>
+                        <p className="mt-1">{t('accountsPage.sharedStandardDesc')}</p>
+                      </div>
+                      <div className="rounded-md border p-2.5">
+                        <p className="font-semibold text-foreground">
+                          {t('accountsPage.sharedDeeper')}
+                        </p>
                         <p className="mt-1">
-                          Project workspace sync only. Best default for most teams.
+                          {t('accountsPage.sharedDeeperPrefix')} <code>session-env</code>,{' '}
+                          <code>file-history</code>, <code>shell-snapshots</code>,{' '}
+                          <code>todos</code>.
                         </p>
                       </div>
                       <div className="rounded-md border p-2.5">
-                        <p className="font-semibold text-foreground">Shared Deeper</p>
-                        <p className="mt-1">
-                          Adds <code>session-env</code>, <code>file-history</code>,{' '}
-                          <code>shell-snapshots</code>, <code>todos</code>.
+                        <p className="font-semibold text-foreground">
+                          {t('accountsPage.isolated')}
                         </p>
-                      </div>
-                      <div className="rounded-md border p-2.5">
-                        <p className="font-semibold text-foreground">Isolated</p>
-                        <p className="mt-1">No link. Best for strict separation.</p>
+                        <p className="mt-1">{t('accountsPage.isolatedDesc')}</p>
                       </div>
                     </CardContent>
                   </CollapsibleContent>
@@ -188,8 +195,8 @@ export function AccountsPage() {
 
               <Card>
                 <CardHeader className="pb-2">
-                  <CardTitle className="text-sm">Quick Commands</CardTitle>
-                  <CardDescription>Copy and run in terminal.</CardDescription>
+                  <CardTitle className="text-sm">{t('accountsPage.quickCommands')}</CardTitle>
+                  <CardDescription>{t('accountsPage.quickCommandsDesc')}</CardDescription>
                 </CardHeader>
                 <CardContent className="space-y-2">
                   <div className="rounded-md border bg-background px-2 py-2 font-mono text-[11px] flex items-start gap-2">
@@ -215,16 +222,18 @@ export function AccountsPage() {
         <div className="flex-1 min-w-0 flex flex-col bg-background">
           <div className="px-5 py-4 border-b bg-background">
             <div className="flex items-center gap-2">
-              <Badge variant="outline">ccs auth Workspace</Badge>
-              <Badge variant="secondary">History Sync Controls</Badge>
+              <Badge variant="outline">{t('accountsPage.workspaceBadge')}</Badge>
+              <Badge variant="secondary">{t('accountsPage.historySyncBadge')}</Badge>
             </div>
-            <h2 className="mt-2 text-xl font-semibold tracking-tight">Auth Accounts</h2>
+            <h2 className="mt-2 text-xl font-semibold tracking-tight">
+              {t('accountsPage.authAccounts')}
+            </h2>
             <p className="mt-1 text-sm text-muted-foreground">
-              This table is intentionally scoped to
+              {t('accountsPage.tableScopePrefix')}
               <code className="mx-1 rounded bg-muted px-1 py-0.5">ccs auth</code>
-              accounts. Use
+              {t('accountsPage.tableScopeMiddle')}
               <code className="mx-1 rounded bg-muted px-1 py-0.5">Sync</code>
-              for mode/group/depth changes.
+              {t('accountsPage.tableScopeSuffix')}
             </p>
           </div>
 
@@ -240,15 +249,14 @@ export function AccountsPage() {
 
             <Card className="flex flex-col">
               <CardHeader className="pb-3">
-                <CardTitle className="text-lg">Account Matrix</CardTitle>
+                <CardTitle className="text-lg">{t('accountsPage.accountMatrix')}</CardTitle>
                 <CardDescription>
-                  Shared total: {sharedCount}. Actions include Sync settings and legacy
-                  confirmation.
+                  {t('accountsPage.sharedTotalDesc', { count: sharedCount })}
                 </CardDescription>
               </CardHeader>
               <CardContent>
                 {isLoading ? (
-                  <div className="text-muted-foreground">Loading accounts...</div>
+                  <div className="text-muted-foreground">{t('accountsPage.loadingAccounts')}</div>
                 ) : (
                   <AccountsTable data={authAccounts} defaultAccount={data?.default ?? null} />
                 )}
@@ -262,24 +270,24 @@ export function AccountsPage() {
       <div className="p-4 space-y-4 lg:hidden">
         <Card>
           <CardHeader>
-            <CardTitle className="text-lg">Accounts</CardTitle>
+            <CardTitle className="text-lg">{t('accountsPage.title')}</CardTitle>
             <CardDescription>
-              Manage
+              {t('accountsPage.managePrefix')}
               <code className="mx-1 rounded bg-muted px-1 py-0.5">ccs auth</code>
-              continuity per account.
+              {t('accountsPage.mobileManageSuffix')}
             </CardDescription>
           </CardHeader>
           <CardContent className="space-y-2">
             <Button className="w-full" onClick={() => setCreateDialogOpen(true)}>
               <Plus className="w-4 h-4 mr-2" />
-              Create Account
+              {t('accountsPage.createAccount')}
             </Button>
             <Button variant="outline" className="w-full" onClick={handleOpenClaudePool}>
-              Open CLIProxy Claude Pool
+              {t('accountsPage.openCliProxyClaudePool')}
               <ArrowRight className="w-4 h-4 ml-2" />
             </Button>
             <Button variant="outline" className="w-full" onClick={handleOpenClaudePoolAuth}>
-              Authenticate Claude in Pool
+              {t('accountsPage.authClaudeInPool')}
               <Zap className="w-4 h-4 ml-2" />
             </Button>
             <Button
@@ -289,8 +297,8 @@ export function AccountsPage() {
               disabled={confirmLegacyMutation.isPending || legacyTargetCount === 0}
             >
               {confirmLegacyMutation.isPending
-                ? 'Confirming Legacy Policies...'
-                : `Confirm Legacy Policies (${legacyTargetCount})`}
+                ? t('accountsPage.confirmingLegacy')
+                : t('accountsPage.confirmLegacy', { count: legacyTargetCount })}
             </Button>
           </CardContent>
         </Card>
@@ -306,11 +314,11 @@ export function AccountsPage() {
 
         <Card>
           <CardHeader className="pb-3">
-            <CardTitle className="text-base">Account Matrix</CardTitle>
+            <CardTitle className="text-base">{t('accountsPage.accountMatrix')}</CardTitle>
           </CardHeader>
           <CardContent>
             {isLoading ? (
-              <div className="text-muted-foreground">Loading accounts...</div>
+              <div className="text-muted-foreground">{t('accountsPage.loadingAccounts')}</div>
             ) : (
               <AccountsTable data={authAccounts} defaultAccount={data?.default ?? null} />
             )}

ui/src/pages/analytics/components/analytics-header.tsx

@@ -9,6 +9,7 @@ import { subDays, startOfMonth } from 'date-fns';
 import { Button } from '@/components/ui/button';
 import { DateRangeFilter } from '@/components/analytics/date-range-filter';
 import { RefreshCw } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface AnalyticsHeaderProps {
   dateRange: DateRange | undefined;
@@ -29,11 +30,13 @@ export function AnalyticsHeader({
   lastUpdatedText,
   viewMode,
 }: AnalyticsHeaderProps) {
+  const { t } = useTranslation();
+
   return (
     <div className="flex flex-col gap-3 shrink-0 xl:flex-row xl:items-center xl:justify-between">
       <div>
-        <h1 className="text-xl font-semibold">Analytics</h1>
-        <p className="text-sm text-muted-foreground">Track usage & insights</p>
+        <h1 className="text-xl font-semibold">{t('analytics.title')}</h1>
+        <p className="text-sm text-muted-foreground">{t('analytics.subtitle')}</p>
       </div>
       <div className="flex flex-wrap items-center gap-2 xl:justify-end">
         <Button
@@ -51,14 +54,17 @@ export function AnalyticsHeader({
           presets={[
             { label: '7D', range: { from: subDays(new Date(), 7), to: new Date() } },
             { label: '30D', range: { from: subDays(new Date(), 30), to: new Date() } },
-            { label: 'Month', range: { from: startOfMonth(new Date()), to: new Date() } },
-            { label: 'All Time', range: { from: undefined, to: new Date() } },
+            {
+              label: t('analytics.month'),
+              range: { from: startOfMonth(new Date()), to: new Date() },
+            },
+            { label: t('analytics.allTime'), range: { from: undefined, to: new Date() } },
           ]}
         />
 
         {lastUpdatedText && (
           <span className="text-xs text-muted-foreground whitespace-nowrap">
-            Updated {lastUpdatedText}
+            {t('analytics.updated', { value: lastUpdatedText })}
           </span>
         )}
         <Button

ui/src/pages/api.tsx

@@ -29,8 +29,10 @@ import { ConfirmDialog } from '@/components/shared/confirm-dialog';
 import type { Profile } from '@/lib/api-client';
 import { cn } from '@/lib/utils';
 import { CopyButton } from '@/components/ui/copy-button';
+import { useTranslation } from 'react-i18next';
 
 export function ApiPage() {
+  const { t } = useTranslation();
   const { data, isLoading, isError, refetch } = useProfiles();
   const deleteMutation = useDeleteProfile();
   const [selectedProfile, setSelectedProfile] = useState<string | null>(null);
@@ -105,7 +107,7 @@ export function ApiPage() {
             <div className="flex items-center justify-between mb-3">
               <div className="flex items-center gap-2">
                 <Server className="w-5 h-5 text-primary" />
-                <h1 className="font-semibold">API Profiles</h1>
+                <h1 className="font-semibold">{t('apiProfiles.title')}</h1>
               </div>
               <Button
                 size="sm"
@@ -114,7 +116,7 @@ export function ApiPage() {
                 }}
               >
                 <Plus className="w-4 h-4 mr-1" />
-                New
+                {t('apiProfiles.new')}
               </Button>
             </div>
 
@@ -122,7 +124,7 @@ export function ApiPage() {
             <div className="relative">
               <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
               <Input
-                placeholder="Search profiles..."
+                placeholder={t('apiProfiles.searchPlaceholder')}
                 className="pl-8 h-9"
                 value={searchQuery}
                 onChange={(e) => setSearchQuery(e.target.value)}
@@ -133,20 +135,22 @@ export function ApiPage() {
           {/* Profile List */}
           <ScrollArea className="flex-1">
             {isLoading ? (
-              <div className="p-4 text-sm text-muted-foreground">Loading profiles...</div>
+              <div className="p-4 text-sm text-muted-foreground">
+                {t('apiProfiles.loadingProfiles')}
+              </div>
             ) : isError ? (
               <div className="p-4 text-center">
                 <div className="space-y-3 py-8">
                   <AlertCircle className="w-12 h-12 mx-auto text-destructive/50" />
                   <div>
-                    <p className="text-sm font-medium">Failed to load profiles</p>
+                    <p className="text-sm font-medium">{t('apiProfiles.failedLoadTitle')}</p>
                     <p className="text-xs text-muted-foreground mt-1">
-                      Unable to fetch API profiles. Please try again.
+                      {t('apiProfiles.failedLoadDesc')}
                     </p>
                   </div>
                   <Button size="sm" variant="outline" onClick={() => refetch()}>
                     <RefreshCw className="w-4 h-4 mr-1" />
-                    Retry
+                    {t('apiProfiles.retry')}
                   </Button>
                 </div>
               </div>
@@ -156,9 +160,9 @@ export function ApiPage() {
                   <div className="space-y-3 py-8">
                     <FileJson className="w-12 h-12 mx-auto text-muted-foreground/50" />
                     <div>
-                      <p className="text-sm font-medium">No API profiles yet</p>
+                      <p className="text-sm font-medium">{t('apiProfiles.noProfilesYet')}</p>
                       <p className="text-xs text-muted-foreground mt-1">
-                        Create your first profile to connect to custom API endpoints
+                        {t('apiProfiles.noProfilesDesc')}
                       </p>
                     </div>
                     <Button
@@ -169,12 +173,12 @@ export function ApiPage() {
                       }}
                     >
                       <Plus className="w-4 h-4 mr-1" />
-                      Create Profile
+                      {t('apiProfiles.createProfile')}
                     </Button>
                   </div>
                 ) : (
                   <p className="text-sm text-muted-foreground py-4">
-                    No profiles match "{searchQuery}"
+                    {t('apiProfiles.noProfileMatch', { query: searchQuery })}
                   </p>
                 )}
               </div>
@@ -197,12 +201,12 @@ export function ApiPage() {
           {profiles.length > 0 && (
             <div className="p-3 border-t bg-background text-xs text-muted-foreground">
               <div className="flex items-center justify-between">
-                <span>
-                  {profiles.length} profile{profiles.length !== 1 ? 's' : ''}
-                </span>
+                <span>{t('apiProfiles.profileCount', { count: profiles.length })}</span>
                 <span className="flex items-center gap-1">
                   <CheckCircle2 className="w-3 h-3 text-green-600" />
-                  {profiles.filter((p) => p.configured).length} configured
+                  {t('apiProfiles.configuredCount', {
+                    count: profiles.filter((p) => p.configured).length,
+                  })}
                 </span>
               </div>
             </div>
@@ -253,9 +257,9 @@ export function ApiPage() {
       {/* Delete Confirmation */}
       <ConfirmDialog
         open={!!deleteConfirm}
-        title="Delete Profile"
-        description={`Are you sure you want to delete "${deleteConfirm}"? This will remove the settings file and cannot be undone.`}
-        confirmText="Delete"
+        title={t('apiProfiles.deleteProfileTitle')}
+        description={t('apiProfiles.deleteProfileDesc', { name: deleteConfirm ?? '' })}
+        confirmText={t('apiProfiles.delete')}
         variant="destructive"
         onConfirm={() => deleteConfirm && handleDelete(deleteConfirm)}
         onCancel={() => setDeleteConfirm(null)}
@@ -264,9 +268,12 @@ export function ApiPage() {
       {/* Unsaved Changes Confirmation */}
       <ConfirmDialog
         open={!!pendingSwitch}
-        title="Unsaved Changes"
-        description={`You have unsaved changes in "${selectedProfile}". Discard and switch to "${pendingSwitch}"?`}
-        confirmText="Discard & Switch"
+        title={t('apiProfiles.unsavedChangesTitle')}
+        description={t('apiProfiles.unsavedChangesDesc', {
+          current: selectedProfile ?? '',
+          next: pendingSwitch ?? '',
+        })}
+        confirmText={t('apiProfiles.discardSwitch')}
         variant="destructive"
         onConfirm={() => {
           setEditorHasChanges(false);

ui/src/pages/cliproxy.tsx

@@ -34,6 +34,7 @@ import type { AuthStatus, Variant } from '@/lib/api-client';
 import { MODEL_CATALOGS } from '@/lib/model-catalogs';
 import { getProviderDisplayName, isValidProvider } from '@/lib/provider-config';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 // Sidebar provider item
 function ProviderSidebarItem({
@@ -45,6 +46,7 @@ function ProviderSidebarItem({
   isSelected: boolean;
   onSelect: () => void;
 }) {
+  const { t } = useTranslation();
   const accountCount = status.accounts?.length || 0;
 
   return (
@@ -71,12 +73,14 @@ function ProviderSidebarItem({
           {status.authenticated ? (
             <>
               <Check className="w-3 h-3 text-green-600" />
-              <span className="text-xs text-green-600">Connected</span>
+              <span className="text-xs text-green-600">{t('cliproxyPage.connected')}</span>
             </>
           ) : (
             <>
               <X className="w-3 h-3 text-muted-foreground" />
-              <span className="text-xs text-muted-foreground">Not connected</span>
+              <span className="text-xs text-muted-foreground">
+                {t('cliproxyPage.notConnected')}
+              </span>
             </>
           )}
         </div>
@@ -101,6 +105,7 @@ function VariantSidebarItem({
   onDelete: () => void;
   isDeleting?: boolean;
 }) {
+  const { t } = useTranslation();
   return (
     <button
       className={cn(
@@ -119,7 +124,7 @@ function VariantSidebarItem({
         <div className="flex items-center gap-2">
           <span className="font-medium text-sm truncate">{variant.name}</span>
           <Badge variant="outline" className="text-[9px] h-4 px-1">
-            variant
+            {t('cliproxyPage.variant')}
           </Badge>
           <Badge variant="outline" className="text-[9px] h-4 px-1 uppercase">
             {variant.target || 'claude'}
@@ -129,12 +134,16 @@ function VariantSidebarItem({
           {parentAuth?.authenticated ? (
             <>
               <Check className="w-3 h-3 text-green-600" />
-              <span className="text-xs text-muted-foreground truncate">via {variant.provider}</span>
+              <span className="text-xs text-muted-foreground truncate">
+                {t('cliproxyPage.viaProvider', { provider: variant.provider })}
+              </span>
             </>
           ) : (
             <>
               <X className="w-3 h-3 text-muted-foreground" />
-              <span className="text-xs text-muted-foreground">Parent not connected</span>
+              <span className="text-xs text-muted-foreground">
+                {t('cliproxyPage.parentNotConnected')}
+              </span>
             </>
           )}
         </div>
@@ -157,27 +166,25 @@ function VariantSidebarItem({
 
 // Empty state for right panel
 function EmptyProviderState({ onSetup }: { onSetup: () => void }) {
+  const { t } = useTranslation();
   return (
     <div className="flex-1 flex items-center justify-center bg-muted/20">
       <div className="text-center max-w-md px-8">
         <div className="w-16 h-16 rounded-full bg-muted flex items-center justify-center mx-auto mb-6">
           <Zap className="w-8 h-8 text-muted-foreground" />
         </div>
-        <h2 className="text-xl font-semibold mb-2">CCS Profile Manager</h2>
-        <p className="text-muted-foreground mb-4">
-          Manage OAuth authentication, account preferences, and model selection for CLIProxy
-          providers. Configure how CCS routes requests to different AI backends.
-        </p>
+        <h2 className="text-xl font-semibold mb-2">{t('cliproxyPage.emptyTitle')}</h2>
+        <p className="text-muted-foreground mb-4">{t('cliproxyPage.emptyDesc')}</p>
         <p className="text-xs text-muted-foreground mb-6">
-          For live usage stats and real-time monitoring, visit the{' '}
+          {t('cliproxyPage.emptyControlPanelPrefix')}{' '}
           <a href="/cliproxy/control-panel" className="text-primary hover:underline">
-            Control Panel
+            {t('cliproxyPage.controlPanel')}
           </a>
           .
         </p>
         <Button onClick={onSetup} className="gap-2">
           <Sparkles className="w-4 h-4" />
-          Quick Setup
+          {t('cliproxyPage.quickSetup')}
         </Button>
       </div>
     </div>
@@ -185,6 +192,7 @@ function EmptyProviderState({ onSetup }: { onSetup: () => void }) {
 }
 
 export function CliproxyPage() {
+  const { t } = useTranslation();
   const queryClient = useQueryClient();
   const { data: authData, isLoading: authLoading } = useCliproxyAuth();
   const { data: variantsData, isFetching } = useCliproxy();
@@ -337,7 +345,9 @@ export function CliproxyPage() {
               <RefreshCw className={cn('w-4 h-4', isFetching && 'animate-spin')} />
             </Button>
           </div>
-          <p className="text-xs text-muted-foreground mb-3">CCS-level account management</p>
+          <p className="text-xs text-muted-foreground mb-3">
+            {t('cliproxyPage.accountManagement')}
+          </p>
 
           <Button
             variant="default"
@@ -346,7 +356,7 @@ export function CliproxyPage() {
             onClick={() => setWizardOpen(true)}
           >
             <Sparkles className="w-4 h-4" />
-            Quick Setup
+            {t('cliproxyPage.quickSetup')}
           </Button>
         </div>
 
@@ -354,7 +364,7 @@ export function CliproxyPage() {
         <ScrollArea className="flex-1">
           <div className="p-2">
             <div className="text-xs font-medium text-muted-foreground uppercase tracking-wide px-3 py-2">
-              Providers
+              {t('cliproxyPage.providers')}
             </div>
             {authLoading ? (
               <div className="space-y-2 px-2">
@@ -380,7 +390,7 @@ export function CliproxyPage() {
               <>
                 <div className="text-xs font-medium text-muted-foreground uppercase tracking-wide px-3 py-2 mt-4 flex items-center gap-1.5">
                   <GitBranch className="w-3 h-3" />
-                  Variants
+                  {t('cliproxyPage.variants')}
                 </div>
                 <div className="space-y-1">
                   {variants.map((variant) => (
@@ -408,12 +418,12 @@ export function CliproxyPage() {
         {/* Footer Stats */}
         <div className="p-3 border-t bg-background text-xs text-muted-foreground">
           <div className="flex items-center justify-between">
-            <span>
-              {providers.length} provider{providers.length !== 1 ? 's' : ''}
-            </span>
+            <span>{t('cliproxyPage.providerCount', { count: providers.length })}</span>
             <span className="flex items-center gap-1">
               <Check className="w-3 h-3 text-green-600" />
-              {providers.filter((p) => p.authenticated).length} connected
+              {t('cliproxyPage.connectedCount', {
+                count: providers.filter((p) => p.authenticated).length,
+              })}
             </span>
           </div>
         </div>
@@ -429,7 +439,10 @@ export function CliproxyPage() {
           // Variant selected - show ProviderEditor with variant profile name
           <ProviderEditor
             provider={selectedVariantData.name}
-            displayName={`${selectedVariantData.name} (${selectedVariantData.provider} variant)`}
+            displayName={t('cliproxyPage.variantDisplay', {
+              name: selectedVariantData.name,
+              provider: selectedVariantData.provider,
+            })}
             authStatus={parentAuthForVariant}
             catalog={MODEL_CATALOGS[selectedVariantData.provider]}
             logoProvider={selectedVariantData.provider}

ui/src/pages/copilot.tsx

@@ -24,6 +24,7 @@ import {
 import { useCopilot } from '@/hooks/use-copilot';
 import { CopilotConfigForm } from '@/components/copilot/copilot-config-form';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 
 // Status section component
 function StatusSection({ title, children }: { title: string; children: React.ReactNode }) {
@@ -99,6 +100,7 @@ function LoadingSidebar() {
 }
 
 export function CopilotPage() {
+  const { t } = useTranslation();
   const {
     status,
     statusLoading,
@@ -122,7 +124,7 @@ export function CopilotPage() {
           <div className="flex items-center justify-between mb-1">
             <div className="flex items-center gap-2">
               <Github className="w-5 h-5 text-primary" />
-              <h1 className="font-semibold">Copilot</h1>
+              <h1 className="font-semibold">{t('copilotPage.title')}</h1>
             </div>
             <Button
               variant="ghost"
@@ -134,7 +136,7 @@ export function CopilotPage() {
               <RefreshCw className={cn('w-4 h-4', statusLoading && 'animate-spin')} />
             </Button>
           </div>
-          <p className="text-xs text-muted-foreground">GitHub Copilot proxy</p>
+          <p className="text-xs text-muted-foreground">{t('copilotPage.subtitle')}</p>
         </div>
 
         {/* Status Overview */}
@@ -148,18 +150,18 @@ export function CopilotPage() {
                 <div className="flex items-center gap-2">
                   <AlertTriangle className="h-4 w-4 text-yellow-600 dark:text-yellow-400 shrink-0" />
                   <span className="text-xs font-semibold text-yellow-800 dark:text-yellow-200">
-                    Unofficial API - Use at Your Own Risk
+                    {t('copilotPage.unofficialTitle')}
                   </span>
                 </div>
                 <ul className="text-[11px] text-yellow-700 dark:text-yellow-300 space-y-0.5 pl-6 list-disc">
-                  <li>Reverse-engineered API - may break anytime</li>
-                  <li>Excessive use may trigger account restrictions</li>
-                  <li>No warranty, no responsibility from CCS</li>
+                  <li>{t('copilotPage.unofficialItem1')}</li>
+                  <li>{t('copilotPage.unofficialItem2')}</li>
+                  <li>{t('copilotPage.unofficialItem3')}</li>
                 </ul>
               </div>
 
               {/* Setup - Binary first, then enabled status */}
-              <StatusSection title="Setup">
+              <StatusSection title={t('copilotPage.setup')}>
                 <StatusItem
                   icon={Server}
                   label="copilot-api"
@@ -168,8 +170,8 @@ export function CopilotPage() {
                     status?.installed
                       ? status.version
                         ? `v${status.version}`
-                        : 'Installed'
-                      : 'Missing'
+                        : t('copilotPage.installed')
+                      : t('copilotPage.missing')
                   }
                 />
                 {!status?.installed && (
@@ -182,12 +184,12 @@ export function CopilotPage() {
                     {isInstalling ? (
                       <>
                         <Loader2 className="w-3.5 h-3.5 mr-1.5 animate-spin" />
-                        Installing...
+                        {t('copilotPage.installing')}
                       </>
                     ) : (
                       <>
                         <Download className="w-3.5 h-3.5 mr-1.5" />
-                        Install copilot-api
+                        {t('copilotPage.installCopilotApi')}
                       </>
                     )}
                   </Button>
@@ -195,21 +197,27 @@ export function CopilotPage() {
                 {status?.installed && (
                   <StatusItem
                     icon={Power}
-                    label="Integration"
+                    label={t('copilotPage.integration')}
                     status={status?.enabled ?? false}
-                    statusText={status?.enabled ? 'Enabled' : 'Disabled'}
+                    statusText={
+                      status?.enabled ? t('copilotPage.enabled') : t('copilotPage.disabled')
+                    }
                   />
                 )}
               </StatusSection>
 
               {/* Authentication - only show after binary installed */}
               {status?.installed && (
-                <StatusSection title="Auth">
+                <StatusSection title={t('copilotPage.auth')}>
                   <StatusItem
                     icon={Key}
-                    label="GitHub"
+                    label={t('copilotPage.github')}
                     status={status?.authenticated ?? false}
-                    statusText={status?.authenticated ? 'Connected' : 'Not Connected'}
+                    statusText={
+                      status?.authenticated
+                        ? t('copilotPage.connected')
+                        : t('copilotPage.notConnected')
+                    }
                   />
                   {!status?.authenticated && (
                     <Button
@@ -218,7 +226,9 @@ export function CopilotPage() {
                       onClick={() => startAuth()}
                       disabled={isAuthenticating}
                     >
-                      {isAuthenticating ? 'Authenticating...' : 'Authenticate'}
+                      {isAuthenticating
+                        ? t('copilotPage.authenticating')
+                        : t('copilotPage.authenticate')}
                     </Button>
                   )}
                 </StatusSection>
@@ -226,15 +236,17 @@ export function CopilotPage() {
 
               {/* Daemon - only show after authenticated */}
               {status?.authenticated && (
-                <StatusSection title="Daemon">
+                <StatusSection title={t('copilotPage.daemon')}>
                   <StatusItem
                     icon={Cpu}
-                    label="Status"
+                    label={t('copilotPage.status')}
                     status={status?.daemon_running ?? false}
-                    statusText={status?.daemon_running ? 'Running' : 'Stopped'}
+                    statusText={
+                      status?.daemon_running ? t('copilotPage.running') : t('copilotPage.stopped')
+                    }
                   />
                   <div className="px-3 py-1 text-xs text-muted-foreground">
-                    Port: {status?.port ?? 4141}
+                    {t('copilotPage.port')}: {status?.port ?? 4141}
                   </div>
                   <div className="px-1">
                     {status?.daemon_running ? (
@@ -246,7 +258,7 @@ export function CopilotPage() {
                         disabled={isStoppingDaemon}
                       >
                         <PowerOff className="w-3.5 h-3.5 mr-1.5" />
-                        {isStoppingDaemon ? 'Stopping...' : 'Stop'}
+                        {isStoppingDaemon ? t('copilotPage.stopping') : t('copilotPage.stop')}
                       </Button>
                     ) : (
                       <Button
@@ -257,7 +269,7 @@ export function CopilotPage() {
                         disabled={isStartingDaemon}
                       >
                         <Power className="w-3.5 h-3.5 mr-1.5" />
-                        {isStartingDaemon ? 'Starting...' : 'Start'}
+                        {isStartingDaemon ? t('copilotPage.starting') : t('copilotPage.start')}
                       </Button>
                     )}
                   </div>
@@ -270,16 +282,16 @@ export function CopilotPage() {
         {/* Footer */}
         <div className="p-3 border-t bg-background text-xs text-muted-foreground">
           <div className="flex items-center justify-between">
-            <span>Proxy</span>
+            <span>{t('copilotPage.proxy')}</span>
             {status?.daemon_running ? (
               <span className="flex items-center gap-1">
                 <CheckCircle2 className="w-3 h-3 text-green-500" />
-                Active
+                {t('copilotPage.active')}
               </span>
             ) : (
               <span className="flex items-center gap-1">
                 <XCircle className="w-3 h-3 text-muted-foreground" />
-                Inactive
+                {t('copilotPage.inactive')}
               </span>
             )}
           </div>

ui/src/pages/cursor.tsx

@@ -52,6 +52,7 @@ import {
   DialogHeader,
   DialogTitle,
 } from '@/components/ui/dialog';
+import { useTranslation } from 'react-i18next';
 
 interface CursorConfigDraft {
   port: string;
@@ -156,6 +157,7 @@ function CursorModelSelector({
   allowDefaultFallback?: boolean;
   onChange: (value: string) => void;
 }) {
+  const { t } = useTranslation();
   const selectorValue = value || (allowDefaultFallback ? '__default' : '');
   const selected = models.find((model) => model.id === value);
 
@@ -177,12 +179,12 @@ function CursorModelSelector({
         disabled={disabled}
       >
         <SelectTrigger className="h-9">
-          <SelectValue placeholder="Select model">
+          <SelectValue placeholder={t('cursorPage.selectModel')}>
             {selectorValue && (
               <div className="flex items-center gap-2 min-w-0">
                 <span className="truncate font-mono text-xs">
                   {allowDefaultFallback && selectorValue === '__default'
-                    ? 'Use Default Model'
+                    ? t('cursorPage.useDefaultModel')
                     : selected?.name || selectorValue}
                 </span>
                 {selected?.provider && (
@@ -197,9 +199,11 @@ function CursorModelSelector({
         <SelectContent className="max-h-[300px]">
           <SelectGroup>
             <SelectLabel className="text-xs text-muted-foreground">
-              Available Models ({models.length})
+              {t('cursorPage.availableModelCount', { count: models.length })}
             </SelectLabel>
-            {allowDefaultFallback && <SelectItem value="__default">Use Default Model</SelectItem>}
+            {allowDefaultFallback && (
+              <SelectItem value="__default">{t('cursorPage.useDefaultModel')}</SelectItem>
+            )}
             {models.map((model) => (
               <SelectItem key={model.id} value={model.id}>
                 <div className="flex items-center gap-2 min-w-0">
@@ -252,6 +256,7 @@ function StatusItem({
 }
 
 export function CursorPage() {
+  const { t } = useTranslation();
   const {
     status,
     statusLoading,
@@ -342,8 +347,13 @@ export function CursorPage() {
 
   const canStart = Boolean(status?.enabled && status?.authenticated && !status?.token_expired);
   const integrationBadge = useMemo(
-    () => (status?.enabled ? <Badge>Enabled</Badge> : <Badge variant="secondary">Disabled</Badge>),
-    [status?.enabled]
+    () =>
+      status?.enabled ? (
+        <Badge>{t('cursorPage.enabled')}</Badge>
+      ) : (
+        <Badge variant="secondary">{t('cursorPage.disabled')}</Badge>
+      ),
+    [status?.enabled, t]
   );
 
   const handleSaveConfig = async ({
@@ -351,11 +361,11 @@ export function CursorPage() {
   }: { suppressSuccessToast?: boolean } = {}) => {
     const parsedPort = Number(effectivePort);
     if (!Number.isInteger(parsedPort) || parsedPort < 1 || parsedPort > 65535) {
-      toast.error('Port must be an integer between 1 and 65535');
+      toast.error(t('cursorPage.invalidPort'));
       return false;
     }
     if (!effectiveModel.trim()) {
-      toast.error('Default model is required');
+      toast.error(t('cursorPage.defaultModelRequired'));
       return false;
     }
 
@@ -382,23 +392,23 @@ export function CursorPage() {
         })
       );
       if (!suppressSuccessToast) {
-        toast.success('Cursor config and model mapping saved');
+        toast.success(t('cursorPage.savedConfig'));
       }
       return true;
     } catch (error) {
-      toast.error((error as Error).message || 'Failed to save config');
+      toast.error((error as Error).message || t('cursorPage.failedSaveConfig'));
       return false;
     }
   };
 
   const applyPreset = (preset: 'codex53' | 'claude46' | 'gemini3') => {
     if (modelsLoading) {
-      toast.error('Models are still loading. Please wait before applying a preset.');
+      toast.error(t('cursorPage.modelsLoadingWait'));
       return;
     }
 
     if (models.length === 0) {
-      toast.error('No models available yet. Start the daemon and refresh first.');
+      toast.error(t('cursorPage.noModelsAvailable'));
       return;
     }
 
@@ -457,7 +467,7 @@ export function CursorPage() {
         sonnet_model: codex53,
         haiku_model: codexMini,
       }));
-      toast.success('Applied GPT-5.3 Codex preset');
+      toast.success(t('cursorPage.appliedCodexPreset'));
       return;
     }
 
@@ -469,7 +479,7 @@ export function CursorPage() {
         sonnet_model: sonnet45,
         haiku_model: haiku45,
       }));
-      toast.success('Applied Claude 4.6 preset');
+      toast.success(t('cursorPage.appliedClaudePreset'));
       return;
     }
 
@@ -480,30 +490,32 @@ export function CursorPage() {
       sonnet_model: gemini3Pro,
       haiku_model: gemini3Flash,
     }));
-    toast.success('Applied Gemini 3 preset');
+    toast.success(t('cursorPage.appliedGeminiPreset'));
   };
 
   const handleToggleEnabled = async (enabled: boolean) => {
     try {
       await updateConfigAsync({ enabled });
-      toast.success(enabled ? 'Cursor integration enabled' : 'Cursor integration disabled');
+      toast.success(
+        enabled ? t('cursorPage.integrationEnabled') : t('cursorPage.integrationDisabled')
+      );
     } catch (error) {
-      toast.error((error as Error).message || 'Failed to update integration state');
+      toast.error((error as Error).message || t('cursorPage.failedUpdateIntegration'));
     }
   };
 
   const handleAutoDetectAuth = async () => {
     try {
       await autoDetectAuthAsync();
-      toast.success('Cursor credentials imported');
+      toast.success(t('cursorPage.credentialsImported'));
     } catch (error) {
-      toast.error((error as Error).message || 'Auto-detect failed');
+      toast.error((error as Error).message || t('cursorPage.autoDetectFailed'));
     }
   };
 
   const handleManualAuthImport = async () => {
     if (!manualToken.trim() || !manualMachineId.trim()) {
-      toast.error('Token and machine ID are required');
+      toast.error(t('cursorPage.manualRequired'));
       return;
     }
 
@@ -512,12 +524,12 @@ export function CursorPage() {
         accessToken: manualToken.trim(),
         machineId: manualMachineId.trim(),
       });
-      toast.success('Cursor credentials imported');
+      toast.success(t('cursorPage.credentialsImported'));
       setManualAuthOpen(false);
       setManualToken('');
       setManualMachineId('');
     } catch (error) {
-      toast.error((error as Error).message || 'Manual import failed');
+      toast.error((error as Error).message || t('cursorPage.manualImportFailed'));
     }
   };
 
@@ -525,12 +537,16 @@ export function CursorPage() {
     try {
       const result = await startDaemonAsync();
       if (!result.success) {
-        toast.error(result.error || 'Failed to start daemon');
+        toast.error(result.error || t('cursorPage.failedStartDaemon'));
         return;
       }
-      toast.success(`Daemon started${result.pid ? ` (PID: ${result.pid})` : ''}`);
+      toast.success(
+        result.pid
+          ? t('cursorPage.daemonStartedWithPid', { pid: result.pid })
+          : t('cursorPage.daemonStarted')
+      );
     } catch (error) {
-      toast.error((error as Error).message || 'Failed to start daemon');
+      toast.error((error as Error).message || t('cursorPage.failedStartDaemon'));
     }
   };
 
@@ -538,12 +554,12 @@ export function CursorPage() {
     try {
       const result = await stopDaemonAsync();
       if (!result.success) {
-        toast.error(result.error || 'Failed to stop daemon');
+        toast.error(result.error || t('cursorPage.failedStopDaemon'));
         return;
       }
-      toast.success('Daemon stopped');
+      toast.success(t('cursorPage.daemonStopped'));
     } catch (error) {
-      toast.error((error as Error).message || 'Failed to stop daemon');
+      toast.error((error as Error).message || t('cursorPage.failedStopDaemon'));
     }
   };
 
@@ -551,12 +567,12 @@ export function CursorPage() {
     suppressSuccessToast = false,
   }: { suppressSuccessToast?: boolean } = {}) => {
     if (!rawSettingsReady) {
-      toast.error('Raw settings are still loading. Please wait and try again.');
+      toast.error(t('cursorPage.rawLoading'));
       return false;
     }
 
     if (!rawParseResult.isValid || !rawParseResult.settings) {
-      toast.error(rawParseResult.error || 'Invalid JSON');
+      toast.error(rawParseResult.error || t('cursorPage.invalidJson'));
       return false;
     }
 
@@ -567,14 +583,14 @@ export function CursorPage() {
       });
       setRawConfigDirty(false);
       if (!suppressSuccessToast) {
-        toast.success('Raw settings saved');
+        toast.success(t('cursorPage.rawSaved'));
       }
       return true;
     } catch (error) {
       if (isApiConflictError(error)) {
-        toast.error('Raw settings changed externally. Refresh and retry.');
+        toast.error(t('cursorPage.rawChanged'));
       } else {
-        toast.error((error as Error).message || 'Failed to save raw settings');
+        toast.error((error as Error).message || t('cursorPage.failedSaveRaw'));
       }
       return false;
     }
@@ -601,7 +617,7 @@ export function CursorPage() {
     }
 
     if (saveConfig && saveRawSettings) {
-      toast.success('Cursor configuration saved');
+      toast.success(t('cursorPage.savedAll'));
     }
   };
 
@@ -623,12 +639,12 @@ export function CursorPage() {
                   alt=""
                   className="w-5 h-5 object-contain shrink-0"
                 />
-                <h1 className="font-semibold">Cursor</h1>
+                <h1 className="font-semibold">{t('cursorPage.title')}</h1>
                 <Badge
                   variant="outline"
                   className="h-5 border-amber-500/60 bg-amber-500/10 px-1.5 text-[10px] font-semibold uppercase tracking-wide text-amber-800 dark:text-amber-300"
                 >
-                  Beta
+                  {t('cursorPage.beta')}
                 </Badge>
                 {integrationBadge}
               </div>
@@ -642,7 +658,7 @@ export function CursorPage() {
                 <RefreshCw className={cn('w-4 h-4', statusLoading && 'animate-spin')} />
               </Button>
             </div>
-            <p className="text-xs text-muted-foreground">Dedicated Cursor integration controls</p>
+            <p className="text-xs text-muted-foreground">{t('cursorPage.subtitle')}</p>
           </div>
 
           <ScrollArea className="flex-1">
@@ -651,46 +667,48 @@ export function CursorPage() {
                 <div className="flex items-center gap-2">
                   <AlertTriangle className="h-4 w-4 text-yellow-600 dark:text-yellow-400 shrink-0" />
                   <span className="text-xs font-semibold text-yellow-800 dark:text-yellow-200">
-                    Unofficial API - Use at Your Own Risk
+                    {t('cursorPage.unofficialTitle')}
                   </span>
                 </div>
                 <ul className="text-[11px] text-yellow-700 dark:text-yellow-300 space-y-0.5 pl-6 list-disc">
-                  <li>Reverse-engineered integration may break anytime</li>
-                  <li>Abuse or excessive usage may risk account restrictions</li>
-                  <li>No warranty, no responsibility from CCS</li>
+                  <li>{t('cursorPage.unofficialItem1')}</li>
+                  <li>{t('cursorPage.unofficialItem2')}</li>
+                  <li>{t('cursorPage.unofficialItem3')}</li>
                 </ul>
               </div>
 
               <div className="space-y-2">
                 <StatusItem
                   icon={ShieldCheck}
-                  label="Integration"
+                  label={t('cursorPage.integration')}
                   ok={Boolean(status?.enabled)}
-                  detail={status?.enabled ? 'Enabled' : 'Disabled'}
+                  detail={status?.enabled ? t('cursorPage.enabled') : t('cursorPage.disabled')}
                 />
                 <StatusItem
                   icon={Key}
-                  label="Authentication"
+                  label={t('cursorPage.authentication')}
                   ok={Boolean(status?.authenticated && !status?.token_expired)}
                   detail={
                     status?.authenticated
                       ? status?.token_expired
-                        ? 'Expired'
-                        : (status.auth_method ?? 'Connected')
-                      : 'Not connected'
+                        ? t('cursorPage.expired')
+                        : (status.auth_method ?? t('cursorPage.connected'))
+                      : t('cursorPage.notConnected')
                   }
                 />
                 <StatusItem
                   icon={Server}
-                  label="Daemon"
+                  label={t('cursorPage.daemon')}
                   ok={Boolean(status?.daemon_running)}
-                  detail={status?.daemon_running ? 'Running' : 'Stopped'}
+                  detail={
+                    status?.daemon_running ? t('cursorPage.running') : t('cursorPage.stopped')
+                  }
                 />
               </div>
 
               <div className="space-y-2">
                 <p className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Actions
+                  {t('cursorPage.actions')}
                 </p>
 
                 {status?.enabled ? (
@@ -702,7 +720,7 @@ export function CursorPage() {
                     disabled={isUpdatingConfig}
                   >
                     <PowerOff className="w-3.5 h-3.5 mr-1.5" />
-                    Disable Integration
+                    {t('cursorPage.disableIntegration')}
                   </Button>
                 ) : (
                   <Button
@@ -712,7 +730,7 @@ export function CursorPage() {
                     disabled={isUpdatingConfig}
                   >
                     <Power className="w-3.5 h-3.5 mr-1.5" />
-                    Enable Integration
+                    {t('cursorPage.enableIntegration')}
                   </Button>
                 )}
 
@@ -728,7 +746,7 @@ export function CursorPage() {
                   ) : (
                     <Key className="w-3.5 h-3.5 mr-1.5" />
                   )}
-                  Auto-detect Auth
+                  {t('cursorPage.autoDetectAuth')}
                 </Button>
 
                 <Button
@@ -738,7 +756,7 @@ export function CursorPage() {
                   onClick={() => setManualAuthOpen(true)}
                 >
                   <Key className="w-3.5 h-3.5 mr-1.5" />
-                  Manual Auth Import
+                  {t('cursorPage.manualAuthImport')}
                 </Button>
 
                 {status?.daemon_running ? (
@@ -754,7 +772,7 @@ export function CursorPage() {
                     ) : (
                       <PowerOff className="w-3.5 h-3.5 mr-1.5" />
                     )}
-                    Stop Daemon
+                    {t('cursorPage.stopDaemon')}
                   </Button>
                 ) : (
                   <Button
@@ -768,7 +786,7 @@ export function CursorPage() {
                     ) : (
                       <Play className="w-3.5 h-3.5 mr-1.5" />
                     )}
-                    Start Daemon
+                    {t('cursorPage.startDaemon')}
                   </Button>
                 )}
               </div>
@@ -777,7 +795,7 @@ export function CursorPage() {
 
           <div className="p-3 border-t bg-background text-xs text-muted-foreground">
             <div className="flex items-center justify-between">
-              <span>Port</span>
+              <span>{t('cursorPage.port')}</span>
               <span>{status?.port ?? config?.port ?? DEFAULT_CURSOR_PORT}</span>
             </div>
           </div>
@@ -789,7 +807,7 @@ export function CursorPage() {
               <div className="flex items-center gap-3">
                 <div>
                   <div className="flex items-center gap-2">
-                    <h2 className="text-lg font-semibold">Cursor Configuration</h2>
+                    <h2 className="text-lg font-semibold">{t('cursorPage.configuration')}</h2>
                     {rawSettings && (
                       <Badge variant="outline" className="text-xs">
                         cursor.settings.json
@@ -798,10 +816,10 @@ export function CursorPage() {
                   </div>
                   {rawSettings && (
                     <p className="text-xs text-muted-foreground mt-0.5">
-                      Last modified:{' '}
+                      {t('cursorPage.lastModified')}{' '}
                       {rawSettings.exists
                         ? new Date(rawSettings.mtime).toLocaleString()
-                        : 'Never saved'}
+                        : t('cursorPage.neverSaved')}
                     </p>
                   )}
                 </div>
@@ -828,12 +846,12 @@ export function CursorPage() {
                   {isUpdatingConfig || isSavingRawSettings ? (
                     <>
                       <Loader2 className="w-4 h-4 mr-1 animate-spin" />
-                      Saving...
+                      {t('cursorPage.saving')}
                     </>
                   ) : (
                     <>
                       <Save className="w-4 h-4 mr-1" />
-                      Save
+                      {t('cursorPage.save')}
                     </>
                   )}
                 </Button>
@@ -846,13 +864,13 @@ export function CursorPage() {
                   <div className="px-4 pt-4 shrink-0">
                     <TabsList className="w-full">
                       <TabsTrigger value="config" className="flex-1">
-                        Model Config
+                        {t('cursorPage.modelConfig')}
                       </TabsTrigger>
                       <TabsTrigger value="settings" className="flex-1">
-                        Settings
+                        {t('cursorPage.settings')}
                       </TabsTrigger>
                       <TabsTrigger value="info" className="flex-1">
-                        Info
+                        {t('cursorPage.info')}
                       </TabsTrigger>
                     </TabsList>
                   </div>
@@ -867,10 +885,10 @@ export function CursorPage() {
                           <div>
                             <h3 className="text-sm font-medium mb-2 flex items-center gap-2">
                               <Sparkles className="w-4 h-4" />
-                              Presets
+                              {t('cursorPage.presets')}
                             </h3>
                             <p className="text-xs text-muted-foreground mb-3">
-                              Apply pre-configured model mappings
+                              {t('cursorPage.presetsDesc')}
                             </p>
                             <div className="flex flex-wrap gap-2">
                               <Button
@@ -912,14 +930,16 @@ export function CursorPage() {
                           <Separator />
 
                           <div>
-                            <h3 className="text-sm font-medium mb-2">Model Mapping</h3>
+                            <h3 className="text-sm font-medium mb-2">
+                              {t('cursorPage.modelMapping')}
+                            </h3>
                             <p className="text-xs text-muted-foreground mb-4">
-                              Configure which models to use for each tier
+                              {t('cursorPage.modelMappingDesc')}
                             </p>
                             <div className="space-y-4">
                               <CursorModelSelector
-                                label="Default Model"
-                                description="Used when no specific tier is requested."
+                                label={t('cursorPage.defaultModel')}
+                                description={t('cursorPage.defaultModelDesc')}
                                 value={effectiveModel}
                                 models={orderedModels}
                                 disabled={modelsLoading}
@@ -928,8 +948,8 @@ export function CursorPage() {
                                 }}
                               />
                               <CursorModelSelector
-                                label="Opus (Most capable)"
-                                description="Complex reasoning and highest quality responses."
+                                label={t('cursorPage.opusModel')}
+                                description={t('cursorPage.opusModelDesc')}
                                 value={effectiveOpusModel}
                                 models={orderedModels}
                                 disabled={modelsLoading}
@@ -939,8 +959,8 @@ export function CursorPage() {
                                 }}
                               />
                               <CursorModelSelector
-                                label="Sonnet (Balanced)"
-                                description="General coding and day-to-day chat workloads."
+                                label={t('cursorPage.sonnetModel')}
+                                description={t('cursorPage.sonnetModelDesc')}
                                 value={effectiveSonnetModel}
                                 models={orderedModels}
                                 disabled={modelsLoading}
@@ -950,8 +970,8 @@ export function CursorPage() {
                                 }}
                               />
                               <CursorModelSelector
-                                label="Haiku (Fast)"
-                                description="Low-latency and lightweight request paths."
+                                label={t('cursorPage.haikuModel')}
+                                description={t('cursorPage.haikuModelDesc')}
                                 value={effectiveHaikuModel}
                                 models={orderedModels}
                                 disabled={modelsLoading}
@@ -973,7 +993,9 @@ export function CursorPage() {
                       <ScrollArea className="flex-1">
                         <div className="p-4 space-y-6">
                           <div className="space-y-4">
-                            <h3 className="text-sm font-medium">Runtime Settings</h3>
+                            <h3 className="text-sm font-medium">
+                              {t('cursorPage.runtimeSettings')}
+                            </h3>
 
                             <div className="space-y-2">
                               <Label htmlFor="cursor-port" className="text-xs">
@@ -998,10 +1020,10 @@ export function CursorPage() {
                             <div className="flex items-center justify-between rounded-lg border p-3">
                               <div className="space-y-0.5">
                                 <Label htmlFor="cursor-auto-start" className="text-xs">
-                                  Auto-start Daemon
+                                  {t('cursorPage.autoStartDaemon')}
                                 </Label>
                                 <p className="text-[10px] text-muted-foreground">
-                                  Start Cursor daemon automatically when integration is used.
+                                  {t('cursorPage.autoStartDesc')}
                                 </p>
                               </div>
                               <Switch
@@ -1016,10 +1038,10 @@ export function CursorPage() {
                             <div className="flex items-center justify-between rounded-lg border p-3">
                               <div className="space-y-0.5">
                                 <Label htmlFor="cursor-ghost-mode" className="text-xs">
-                                  Ghost Mode
+                                  {t('cursorPage.ghostMode')}
                                 </Label>
                                 <p className="text-[10px] text-muted-foreground">
-                                  Request `x-ghost-mode` to reduce telemetry.
+                                  {t('cursorPage.ghostModeDesc')}
                                 </p>
                               </div>
                               <Switch
@@ -1043,11 +1065,15 @@ export function CursorPage() {
                         <div className="p-4 space-y-6">
                           <div className="space-y-3 bg-card rounded-lg border p-4 shadow-sm">
                             <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                              <span className="font-medium text-muted-foreground">Provider</span>
+                              <span className="font-medium text-muted-foreground">
+                                {t('cursorPage.provider')}
+                              </span>
                               <span className="font-mono">Cursor IDE</span>
                             </div>
                             <div className="grid grid-cols-[100px_1fr] gap-2 text-sm items-center">
-                              <span className="font-medium text-muted-foreground">File Path</span>
+                              <span className="font-medium text-muted-foreground">
+                                {t('cursorPage.filePath')}
+                              </span>
                               <code className="bg-muted px-1.5 py-0.5 rounded text-xs break-all">
                                 {rawSettings?.path ?? '~/.ccs/cursor.settings.json'}
                               </code>
@@ -1060,15 +1086,17 @@ export function CursorPage() {
                           </div>
 
                           <div>
-                            <h3 className="text-sm font-medium mb-3">Available Models</h3>
+                            <h3 className="text-sm font-medium mb-3">
+                              {t('cursorPage.availableModels')}
+                            </h3>
                             {modelsLoading ? (
                               <div className="flex items-center gap-2 text-muted-foreground">
                                 <Loader2 className="w-4 h-4 animate-spin" />
-                                Loading models...
+                                {t('cursorPage.loadingModels')}
                               </div>
                             ) : models.length === 0 ? (
                               <p className="text-sm text-muted-foreground">
-                                No model metadata available yet. Start daemon and refresh.
+                                {t('cursorPage.noModels')}
                               </p>
                             ) : (
                               <div className="space-y-2">
@@ -1083,7 +1111,9 @@ export function CursorPage() {
                                         {model.name} • {model.provider}
                                       </p>
                                     </div>
-                                    {model.id === currentModel && <Badge>Default</Badge>}
+                                    {model.id === currentModel && (
+                                      <Badge>{t('cursorPage.default')}</Badge>
+                                    )}
                                   </div>
                                 ))}
                               </div>
@@ -1100,7 +1130,7 @@ export function CursorPage() {
                 <div className="px-6 py-2 bg-muted/30 border-b flex items-center gap-2 shrink-0 h-[45px]">
                   <Code2 className="w-4 h-4 text-muted-foreground" />
                   <span className="text-sm font-medium text-muted-foreground">
-                    Raw Configuration (JSON)
+                    {t('cursorPage.rawConfiguration')}
                   </span>
                 </div>
                 <RawEditorSection
@@ -1122,36 +1152,34 @@ export function CursorPage() {
       <Dialog open={manualAuthOpen} onOpenChange={setManualAuthOpen}>
         <DialogContent>
           <DialogHeader>
-            <DialogTitle>Manual Cursor Auth Import</DialogTitle>
-            <DialogDescription>
-              Provide Cursor access token and machine ID if auto-detect is unavailable.
-            </DialogDescription>
+            <DialogTitle>{t('cursorPage.manualImportTitle')}</DialogTitle>
+            <DialogDescription>{t('cursorPage.manualImportDesc')}</DialogDescription>
           </DialogHeader>
 
           <div className="space-y-3">
             <div className="space-y-1.5">
-              <Label htmlFor="cursor-manual-token">Access Token</Label>
+              <Label htmlFor="cursor-manual-token">{t('cursorPage.accessToken')}</Label>
               <Input
                 id="cursor-manual-token"
                 value={manualToken}
                 onChange={(e) => setManualToken(e.target.value)}
-                placeholder="Paste Cursor access token"
+                placeholder={t('cursorPage.accessTokenPlaceholder')}
               />
             </div>
             <div className="space-y-1.5">
-              <Label htmlFor="cursor-manual-machine-id">Machine ID</Label>
+              <Label htmlFor="cursor-manual-machine-id">{t('cursorPage.machineId')}</Label>
               <Input
                 id="cursor-manual-machine-id"
                 value={manualMachineId}
                 onChange={(e) => setManualMachineId(e.target.value)}
-                placeholder="32-char hex (UUID without hyphens)"
+                placeholder={t('cursorPage.machineIdPlaceholder')}
               />
             </div>
           </div>
 
           <DialogFooter>
             <Button variant="outline" onClick={() => setManualAuthOpen(false)}>
-              Cancel
+              {t('cursorPage.cancel')}
             </Button>
             <Button onClick={handleManualAuthImport} disabled={isImportingManualAuth}>
               {isImportingManualAuth ? (
@@ -1159,7 +1187,7 @@ export function CursorPage() {
               ) : (
                 <Key className="w-4 h-4 mr-2" />
               )}
-              Import
+              {t('cursorPage.import')}
             </Button>
           </DialogFooter>
         </DialogContent>

ui/src/pages/droid.tsx

@@ -27,6 +27,7 @@ import { Separator } from '@/components/ui/separator';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { cn } from '@/lib/utils';
+import { useTranslation } from 'react-i18next';
 import {
   applyAnthropicBudgetTokensToDroidByokModel,
   applyReasoningEffortToDroidByokModel,
@@ -166,6 +167,7 @@ function DetailRow({
 }
 
 export function DroidPage() {
+  const { t } = useTranslation();
   const {
     diagnostics,
     diagnosticsLoading,
@@ -201,7 +203,7 @@ export function DroidPage() {
 
   const updateSettingsField = (key: string, value: unknown | null) => {
     if (!rawEditorParsed.valid) {
-      toast.error('Fix JSON syntax before using quick settings controls.');
+      toast.error(t('droidPage.fixJsonBeforeQuickSettings'));
       return;
     }
 
@@ -248,7 +250,7 @@ export function DroidPage() {
 
   const handleSaveRawSettings = async () => {
     if (!rawEditorValidation.valid) {
-      toast.error(`Invalid JSON: ${rawEditorValidation.error}`);
+      toast.error(t('droidPage.invalidJson', { value: rawEditorValidation.error }));
       return;
     }
 
@@ -258,12 +260,12 @@ export function DroidPage() {
         expectedMtime: rawSettings?.exists ? rawSettings.mtime : undefined,
       });
       setRawDraftText(null);
-      toast.success('Droid settings saved');
+      toast.success(t('droidPage.saved'));
     } catch (error) {
       if (isApiConflictError(error)) {
-        toast.error('Droid settings changed externally. Refresh and retry.');
+        toast.error(t('droidPage.changedExternally'));
       } else {
-        toast.error((error as Error).message || 'Failed to save Droid settings');
+        toast.error((error as Error).message || t('droidPage.failedSave'));
       }
     }
   };
@@ -279,7 +281,7 @@ export function DroidPage() {
       return (
         <div className="flex h-full items-center justify-center text-muted-foreground">
           <Loader2 className="h-5 w-5 animate-spin mr-2" />
-          Loading Droid diagnostics...
+          {t('droidPage.loadingDiagnostics')}
         </div>
       );
     }
@@ -287,7 +289,7 @@ export function DroidPage() {
     if (diagnosticsError || !diagnostics) {
       return (
         <div className="flex h-full items-center justify-center text-destructive px-6 text-center">
-          Failed to load Droid diagnostics.
+          {t('droidPage.failedDiagnostics')}
         </div>
       );
     }
@@ -314,9 +316,9 @@ export function DroidPage() {
       <Tabs defaultValue="byok" className="h-full flex flex-col">
         <div className="px-4 pt-4 shrink-0">
           <TabsList className="grid w-full grid-cols-3">
-            <TabsTrigger value="overview">Overview</TabsTrigger>
-            <TabsTrigger value="byok">BYOK</TabsTrigger>
-            <TabsTrigger value="docs">Docs</TabsTrigger>
+            <TabsTrigger value="overview">{t('droidPage.overview')}</TabsTrigger>
+            <TabsTrigger value="byok">{t('droidPage.byok')}</TabsTrigger>
+            <TabsTrigger value="docs">{t('droidPage.docs')}</TabsTrigger>
           </TabsList>
         </div>
 
@@ -328,34 +330,40 @@ export function DroidPage() {
                   <CardHeader className="pb-2">
                     <CardTitle className="text-base flex items-center gap-2">
                       <TerminalSquare className="h-4 w-4" />
-                      Runtime & Installation
+                      {t('droidPage.runtimeInstall')}
                     </CardTitle>
                   </CardHeader>
                   <CardContent className="space-y-2">
                     <div className="flex items-center justify-between">
-                      <span className="text-sm text-muted-foreground">Status</span>
+                      <span className="text-sm text-muted-foreground">{t('droidPage.status')}</span>
                       <Badge variant={diagnostics.binary.installed ? 'default' : 'secondary'}>
-                        {diagnostics.binary.installed ? 'Detected' : 'Not Found'}
+                        {diagnostics.binary.installed
+                          ? t('droidPage.detected')
+                          : t('droidPage.notFound')}
                       </Badge>
                     </div>
-                    <DetailRow label="Detection source" value={diagnostics.binary.source} mono />
                     <DetailRow
-                      label="Binary path"
-                      value={diagnostics.binary.path || 'Not detected'}
+                      label={t('droidPage.detectionSource')}
+                      value={diagnostics.binary.source}
                       mono
                     />
                     <DetailRow
-                      label="Install directory"
+                      label={t('droidPage.binaryPath')}
+                      value={diagnostics.binary.path || t('droidPage.notFound')}
+                      mono
+                    />
+                    <DetailRow
+                      label={t('droidPage.installDirectory')}
                       value={diagnostics.binary.installDir || 'N/A'}
                       mono
                     />
                     <DetailRow
-                      label="Version"
+                      label={t('droidPage.version')}
                       value={diagnostics.binary.version || 'Unknown'}
                       mono
                     />
                     <DetailRow
-                      label="Override (CCS_DROID_PATH)"
+                      label={t('droidPage.overridePath')}
                       value={diagnostics.binary.overridePath || 'Not set'}
                       mono
                     />
@@ -366,7 +374,7 @@ export function DroidPage() {
                   <CardHeader className="pb-2">
                     <CardTitle className="text-base flex items-center gap-2">
                       <Folder className="h-4 w-4" />
-                      Config Files
+                      {t('droidPage.configFiles')}
                     </CardTitle>
                   </CardHeader>
                   <CardContent className="space-y-3">
@@ -380,15 +388,25 @@ export function DroidPage() {
                             <XCircle className="h-4 w-4 text-muted-foreground" />
                           )}
                         </div>
-                        <DetailRow label="Path" value={file.path} mono />
-                        <DetailRow label="Resolved" value={file.resolvedPath} mono />
-                        <DetailRow label="Size" value={formatBytes(file.sizeBytes)} />
-                        <DetailRow label="Last modified" value={formatTimestamp(file.mtimeMs)} />
+                        <DetailRow label={t('droidPage.path')} value={file.path} mono />
+                        <DetailRow label={t('droidPage.resolved')} value={file.resolvedPath} mono />
+                        <DetailRow
+                          label={t('droidPage.size')}
+                          value={formatBytes(file.sizeBytes)}
+                        />
+                        <DetailRow
+                          label={t('droidPage.lastModified')}
+                          value={formatTimestamp(file.mtimeMs)}
+                        />
                         {file.parseError && (
-                          <p className="text-xs text-amber-600">Parse warning: {file.parseError}</p>
+                          <p className="text-xs text-amber-600">
+                            {t('droidPage.parseWarning', { value: file.parseError })}
+                          </p>
                         )}
                         {file.readError && (
-                          <p className="text-xs text-destructive">Read warning: {file.readError}</p>
+                          <p className="text-xs text-destructive">
+                            {t('droidPage.readWarning', { value: file.readError })}
+                          </p>
                         )}
                       </div>
                     ))}
@@ -400,7 +418,7 @@ export function DroidPage() {
                     <CardHeader className="pb-2">
                       <CardTitle className="text-base flex items-center gap-2">
                         <AlertTriangle className="h-4 w-4 text-amber-600" />
-                        Warnings
+                        {t('droidPage.warnings')}
                       </CardTitle>
                     </CardHeader>
                     <CardContent className="space-y-1.5">
@@ -444,11 +462,11 @@ export function DroidPage() {
                   disabledReason={
                     rawEditorParsed.valid
                       ? null
-                      : `BYOK reasoning controls disabled: ${rawEditorParsed.error}`
+                      : `${t('droidPage.byok')}: ${rawEditorParsed.error}`
                   }
                   onEffortChange={(modelId, effort) => {
                     if (!rawEditorParsed.valid) {
-                      toast.error('Fix JSON syntax before updating BYOK reasoning settings.');
+                      toast.error(t('droidPage.fixJsonBeforeReasoning'));
                       return;
                     }
 
@@ -458,7 +476,7 @@ export function DroidPage() {
                       effort
                     );
                     if (!nextSettings) {
-                      toast.error('Unable to update selected BYOK model reasoning setting.');
+                      toast.error(t('droidPage.unableUpdateReasoning'));
                       return;
                     }
 
@@ -466,7 +484,7 @@ export function DroidPage() {
                   }}
                   onAnthropicBudgetChange={(modelId, budgetTokens) => {
                     if (!rawEditorParsed.valid) {
-                      toast.error('Fix JSON syntax before updating thinking budget.');
+                      toast.error(t('droidPage.fixJsonBeforeBudget'));
                       return;
                     }
 
@@ -476,7 +494,7 @@ export function DroidPage() {
                       budgetTokens
                     );
                     if (!nextSettings) {
-                      toast.error('Thinking budget is only available for Anthropic BYOK models.');
+                      toast.error(t('droidPage.anthropicOnlyBudget'));
                       return;
                     }
 
@@ -488,38 +506,38 @@ export function DroidPage() {
                   <CardHeader className="pb-2">
                     <CardTitle className="text-base flex items-center gap-2">
                       <Server className="h-4 w-4" />
-                      BYOK Summary
+                      {t('droidPage.byokSummary')}
                     </CardTitle>
                   </CardHeader>
                   <CardContent className="space-y-2">
                     <DetailRow
-                      label="Active model selector"
+                      label={t('droidPage.activeModelSelector')}
                       value={diagnostics.byok.activeModelSelector || 'Not set'}
                       mono
                     />
                     <DetailRow
-                      label="Custom models"
+                      label={t('droidPage.customModels')}
                       value={String(diagnostics.byok.customModelCount)}
                     />
                     <DetailRow
-                      label="CCS-managed"
+                      label={t('droidPage.ccsManaged')}
                       value={String(diagnostics.byok.ccsManagedCount)}
                     />
                     <DetailRow
-                      label="User-managed"
+                      label={t('droidPage.userManaged')}
                       value={String(diagnostics.byok.userManagedCount)}
                     />
                     <DetailRow
-                      label="Malformed entries"
+                      label={t('droidPage.malformedEntries')}
                       value={String(diagnostics.byok.invalidModelEntryCount)}
                     />
                     <Separator />
                     <div className="space-y-1">
-                      <p className="text-xs text-muted-foreground">Providers</p>
+                      <p className="text-xs text-muted-foreground">{t('droidPage.providers')}</p>
                       <div className="flex flex-wrap gap-1.5">
                         {providerRows.length === 0 && (
                           <Badge variant="secondary" className="font-mono">
-                            none
+                            {t('droidPage.none')}
                           </Badge>
                         )}
                         {providerRows.map(([provider, count]) => (
@@ -534,20 +552,20 @@ export function DroidPage() {
 
                 <Card>
                   <CardHeader className="pb-2">
-                    <CardTitle className="text-base">Custom Models</CardTitle>
+                    <CardTitle className="text-base">{t('droidPage.customModelsTitle')}</CardTitle>
                   </CardHeader>
                   <CardContent>
                     <div className="rounded-md border overflow-hidden">
                       <div className="grid grid-cols-[2fr_1fr_2fr] bg-muted/40 px-3 py-2 text-xs font-medium">
-                        <span>Name / Model</span>
-                        <span>Provider</span>
-                        <span>Base URL</span>
+                        <span>{t('droidPage.modelName')}</span>
+                        <span>{t('droidPage.provider')}</span>
+                        <span>{t('droidPage.baseUrl')}</span>
                       </div>
                       <ScrollArea className="h-52">
                         <div className="divide-y">
                           {customModels.length === 0 && (
                             <div className="px-3 py-4 text-xs text-muted-foreground">
-                              No custom models
+                              {t('droidPage.noCustomModels')}
                             </div>
                           )}
                           {customModels.map((model) => (
@@ -593,7 +611,7 @@ export function DroidPage() {
                   <CardHeader className="pb-2">
                     <CardTitle className="text-base flex items-center gap-2">
                       <ShieldCheck className="h-4 w-4" />
-                      Docs-Aligned Notes
+                      {t('droidPage.docsAlignedNotes')}
                     </CardTitle>
                   </CardHeader>
                   <CardContent className="space-y-2 text-sm">
@@ -605,7 +623,7 @@ export function DroidPage() {
                     <Separator />
                     <div className="space-y-2">
                       <p className="text-xs text-muted-foreground uppercase tracking-wide">
-                        Factory Docs
+                        {t('droidPage.factoryDocs')}
                       </p>
                       <div className="space-y-1.5">
                         {docsLinks.map((link) => (
@@ -633,7 +651,7 @@ export function DroidPage() {
                     <Separator />
                     <div className="space-y-2">
                       <p className="text-xs text-muted-foreground uppercase tracking-wide">
-                        Provider Fact-Check Docs
+                        {t('droidPage.providerFactCheckDocs')}
                       </p>
                       <div className="space-y-1.5">
                         {providerDocs.map((providerDoc) => (
@@ -660,10 +678,10 @@ export function DroidPage() {
                     </div>
                     <Separator />
                     <p className="text-xs text-muted-foreground">
-                      Provider values: {providerValues.join(', ')}
+                      {t('droidPage.providerValues', { value: providerValues.join(', ') })}
                     </p>
                     <p className="text-xs text-muted-foreground">
-                      Settings hierarchy: {settingsHierarchy.join(' -> ')}
+                      {t('droidPage.settingsHierarchy', { value: settingsHierarchy.join(' -> ') })}
                     </p>
                   </CardContent>
                 </Card>
@@ -686,7 +704,7 @@ export function DroidPage() {
         </PanelResizeHandle>
         <Panel defaultSize={55} minSize={35}>
           <RawJsonSettingsEditorPanel
-            title="Droid BYOK Settings"
+            title={t('droidPage.settingsTitle')}
             pathLabel={rawSettings?.path || '~/.factory/settings.json'}
             loading={rawSettingsLoading}
             parseWarning={rawSettings?.parseError}

ui/src/pages/health.tsx

@@ -9,6 +9,7 @@ import { useHealth, type HealthGroup } from '@/hooks/use-health';
 import { cn } from '@/lib/utils';
 import { toast } from 'sonner';
 import { useEffect, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 
 function getOverallStatus(summary: { passed: number; warnings: number; errors: number }) {
   if (summary.errors > 0) return 'error';
@@ -16,14 +17,17 @@ function getOverallStatus(summary: { passed: number; warnings: number; errors: n
   return 'ok';
 }
 
-function formatRelativeTime(timestamp: number): string {
+function formatRelativeTime(
+  timestamp: number,
+  t: (key: string, options?: Record<string, unknown>) => string
+): string {
   const seconds = Math.floor((Date.now() - timestamp) / 1000);
-  if (seconds < 5) return 'just now';
-  if (seconds < 60) return `${seconds}s ago`;
+  if (seconds < 5) return t('health.justNow');
+  if (seconds < 60) return t('health.secondsAgo', { count: seconds });
   const minutes = Math.floor(seconds / 60);
-  if (minutes < 60) return `${minutes}m ago`;
+  if (minutes < 60) return t('health.minutesAgo', { count: minutes });
   const hours = Math.floor(minutes / 60);
-  return `${hours}h ago`;
+  return t('health.hoursAgo', { count: hours });
 }
 
 function sortGroupsByIssues(groups: HealthGroup[]): HealthGroup[] {
@@ -75,6 +79,7 @@ function LoadingSkeleton() {
 }
 
 export function HealthPage() {
+  const { t } = useTranslation();
   const { data, isLoading, refetch, dataUpdatedAt } = useHealth();
 
   // Use dataUpdatedAt directly instead of storing in state
@@ -91,12 +96,12 @@ export function HealthPage() {
 
   const copyDoctorCommand = () => {
     navigator.clipboard.writeText('ccs doctor');
-    toast.success('Copied to clipboard');
+    toast.success(t('health.copied'));
   };
 
   const handleRefresh = () => {
     refetch();
-    toast.info('Refreshing health checks...');
+    toast.info(t('health.refreshing'));
   };
 
   if (isLoading && !data) {
@@ -154,10 +159,12 @@ export function HealthPage() {
 
             {/* Main title */}
             <div className="flex items-center gap-3 flex-wrap">
-              <h1 className="text-2xl font-bold font-mono tracking-tight">System Health</h1>
+              <h1 className="text-2xl font-bold font-mono tracking-tight">
+                {t('health.systemHealth')}
+              </h1>
               {data?.version && (
                 <Badge variant="outline" className="font-mono text-xs bg-muted/50">
-                  build {data.version}
+                  {t('health.build', { version: data.version })}
                 </Badge>
               )}
             </div>
@@ -165,12 +172,12 @@ export function HealthPage() {
             {/* Status message */}
             <div className="flex items-center gap-2 text-sm">
               <Cpu className="w-4 h-4 text-muted-foreground" />
-              <span className="text-muted-foreground">Last scan:</span>
+              <span className="text-muted-foreground">{t('health.lastScan')}</span>
               <span className="font-mono">
-                {lastRefresh ? formatRelativeTime(lastRefresh) : '--'}
+                {lastRefresh ? formatRelativeTime(lastRefresh, t) : '--'}
               </span>
               <span className="text-muted-foreground">|</span>
-              <span className="text-muted-foreground">Auto-refresh:</span>
+              <span className="text-muted-foreground">{t('health.autoRefresh')}</span>
               <span className="font-mono text-green-500">30s</span>
             </div>
           </div>
@@ -195,7 +202,7 @@ export function HealthPage() {
               className="gap-2"
             >
               <RefreshCw className={cn('w-4 h-4', isLoading && 'animate-spin')} />
-              <span className="hidden sm:inline">Refresh</span>
+              <span className="hidden sm:inline">{t('health.refresh')}</span>
               <kbd className="hidden md:inline-flex h-5 items-center gap-1 rounded border bg-muted px-1.5 font-mono text-[10px] font-medium text-muted-foreground">
                 R
               </kbd>
@@ -237,10 +244,10 @@ export function HealthPage() {
       <div className="flex items-center justify-between text-xs text-muted-foreground border-t pt-4">
         <div className="flex items-center gap-4">
           <span>
-            Version <span className="font-mono">{data?.version ?? '--'}</span>
+            {t('health.version')} <span className="font-mono">{data?.version ?? '--'}</span>
           </span>
           <span>
-            Platform{' '}
+            {t('health.platform')}{' '}
             <span className="font-mono">
               {typeof navigator !== 'undefined' ? navigator.platform : 'linux'}
             </span>
@@ -248,7 +255,7 @@ export function HealthPage() {
         </div>
         <div className="flex items-center gap-2">
           <div className="w-2 h-2 rounded-full bg-green-500 animate-pulse" />
-          <span>Live monitoring active</span>
+          <span>{t('health.liveMonitoring')}</span>
         </div>
       </div>
     </div>

ui/src/pages/home.tsx

@@ -9,6 +9,7 @@ import { useOverview } from '@/hooks/use-overview';
 import { useSharedSummary } from '@/hooks/use-shared';
 import { cn } from '@/lib/utils';
 import type { LucideIcon } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 const HEALTH_VARIANTS = {
   ok: 'success',
@@ -62,6 +63,7 @@ function InlineStat({
 }
 
 export function HomePage() {
+  const { t } = useTranslation();
   const navigate = useNavigate();
   const { data: overview, isLoading: isOverviewLoading } = useOverview();
   const { data: shared, isLoading: isSharedLoading } = useSharedSummary();
@@ -134,28 +136,28 @@ export function HomePage() {
           {/* Right: Inline Stats */}
           <div className="flex flex-wrap items-center gap-3">
             <InlineStat
-              title="Profiles"
+              title={t('home.profiles')}
               value={overview?.profiles ?? 0}
               icon={Key}
               variant="accent"
               onClick={() => navigate('/providers')}
             />
             <InlineStat
-              title="CLIProxy"
+              title={t('home.cliproxy')}
               value={overview?.cliproxy ?? 0}
               icon={Zap}
               variant="accent"
               onClick={() => navigate('/cliproxy')}
             />
             <InlineStat
-              title="Accounts"
+              title={t('home.accounts')}
               value={overview?.accounts ?? 0}
               icon={Users}
               variant="default"
               onClick={() => navigate('/accounts')}
             />
             <InlineStat
-              title="Health"
+              title={t('home.health')}
               value={overview?.health ? `${overview.health.passed}/${overview.health.total}` : '-'}
               icon={Activity}
               variant={healthVariant}
@@ -169,7 +171,7 @@ export function HomePage() {
       {shared?.symlinkStatus && !shared.symlinkStatus.valid && (
         <Alert variant="warning">
           <AlertTriangle className="h-4 w-4" />
-          <AlertTitle>Configuration Required</AlertTitle>
+          <AlertTitle>{t('home.configurationRequired')}</AlertTitle>
           <AlertDescription>{shared.symlinkStatus.message}</AlertDescription>
         </Alert>
       )}

ui/src/pages/login.tsx

@@ -12,8 +12,10 @@ import { Label } from '@/components/ui/label';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { AlertCircle, Loader2, Lock } from 'lucide-react';
 import { Alert, AlertDescription } from '@/components/ui/alert';
+import { useTranslation } from 'react-i18next';
 
 export function LoginPage() {
+  const { t } = useTranslation();
   const [username, setUsername] = useState('');
   const [password, setPassword] = useState('');
   const [error, setError] = useState<string | null>(null);
@@ -47,7 +49,7 @@ export function LoginPage() {
       await login(username, password);
       navigate(from, { replace: true });
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Login failed');
+      setError(err instanceof Error ? err.message : t('auth.loginFailed'));
     } finally {
       setLoading(false);
     }
@@ -60,8 +62,8 @@ export function LoginPage() {
           <div className="mx-auto mb-2 flex h-12 w-12 items-center justify-center rounded-full bg-primary/10">
             <Lock className="h-6 w-6 text-primary" />
           </div>
-          <CardTitle className="text-2xl">CCS Dashboard</CardTitle>
-          <CardDescription>Enter your credentials to access the dashboard</CardDescription>
+          <CardTitle className="text-2xl">{t('auth.dashboardTitle')}</CardTitle>
+          <CardDescription>{t('auth.loginDescription')}</CardDescription>
         </CardHeader>
         <CardContent>
           <form onSubmit={handleSubmit} className="space-y-4">
@@ -72,26 +74,26 @@ export function LoginPage() {
               </Alert>
             )}
             <div className="space-y-2">
-              <Label htmlFor="username">Username</Label>
+              <Label htmlFor="username">{t('auth.username')}</Label>
               <Input
                 id="username"
                 type="text"
                 value={username}
                 onChange={(e) => setUsername(e.target.value)}
-                placeholder="Enter username"
+                placeholder={t('auth.usernamePlaceholder')}
                 autoComplete="username"
                 disabled={loading}
                 required
               />
             </div>
             <div className="space-y-2">
-              <Label htmlFor="password">Password</Label>
+              <Label htmlFor="password">{t('auth.password')}</Label>
               <Input
                 id="password"
                 type="password"
                 value={password}
                 onChange={(e) => setPassword(e.target.value)}
-                placeholder="Enter password"
+                placeholder={t('auth.passwordPlaceholder')}
                 autoComplete="current-password"
                 disabled={loading}
                 required
@@ -101,10 +103,10 @@ export function LoginPage() {
               {loading ? (
                 <>
                   <Loader2 className="mr-2 h-4 w-4 animate-spin" />
-                  Signing in...
+                  {t('auth.signingIn')}
                 </>
               ) : (
-                'Sign In'
+                t('auth.signIn')
               )}
             </Button>
           </form>

ui/src/pages/settings/components/tab-navigation.tsx

@@ -6,22 +6,24 @@
 import { Tabs, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { Globe, Settings2, Server, KeyRound, Brain, Archive } from 'lucide-react';
 import type { SettingsTab } from '../types';
+import { useTranslation } from 'react-i18next';
 
 interface TabNavigationProps {
   activeTab: SettingsTab;
   onTabChange: (tab: SettingsTab) => void;
 }
 
-const tabs = [
-  { value: 'websearch' as const, label: 'Web', icon: Globe },
-  { value: 'globalenv' as const, label: 'Env', icon: Settings2 },
-  { value: 'thinking' as const, label: 'Think', icon: Brain },
-  { value: 'proxy' as const, label: 'Proxy', icon: Server },
-  { value: 'auth' as const, label: 'Auth', icon: KeyRound },
-  { value: 'backups' as const, label: 'Backup', icon: Archive },
-] as const;
-
 export function TabNavigation({ activeTab, onTabChange }: TabNavigationProps) {
+  const { t } = useTranslation();
+  const tabs = [
+    { value: 'websearch' as const, label: t('settingsTabs.web'), icon: Globe },
+    { value: 'globalenv' as const, label: t('settingsTabs.env'), icon: Settings2 },
+    { value: 'thinking' as const, label: t('settingsTabs.think'), icon: Brain },
+    { value: 'proxy' as const, label: t('settingsTabs.proxy'), icon: Server },
+    { value: 'auth' as const, label: t('settingsTabs.auth'), icon: KeyRound },
+    { value: 'backups' as const, label: t('settingsTabs.backup'), icon: Archive },
+  ] as const;
+
   return (
     <Tabs value={activeTab} onValueChange={(v) => onTabChange(v as SettingsTab)}>
       <TabsList className="grid w-full grid-cols-6">

ui/src/pages/settings/index.tsx

@@ -21,6 +21,8 @@ import { useSettingsTab, useRawConfig } from './hooks';
 import { TabNavigation } from './components/tab-navigation';
 import { SectionSkeleton } from './components/section-skeleton';
 import type { SettingsTab } from './types';
+import { useTranslation } from 'react-i18next';
+import i18n from '@/lib/i18n';
 
 /**
  * Retry wrapper for dynamic imports with exponential backoff
@@ -72,15 +74,19 @@ class SectionErrorBoundary extends Component<
         <div className="flex-1 flex items-center justify-center text-muted-foreground">
           <div className="text-center p-6 max-w-md">
             <AlertCircle className="w-12 h-12 mx-auto mb-4 text-destructive" />
-            <p className="font-medium text-foreground mb-2">Failed to load section</p>
-            <p className="text-sm mb-4">{this.state.error?.message || 'Unknown error occurred'}</p>
+            <p className="font-medium text-foreground mb-2">
+              {i18n.t('settings.sectionLoadFailed')}
+            </p>
+            <p className="text-sm mb-4">
+              {this.state.error?.message || i18n.t('settings.unknownError')}
+            </p>
             <Button
               variant="outline"
               onClick={() => window.location.reload()}
               className="inline-flex items-center gap-2"
             >
               <RefreshCw className="w-4 h-4" />
-              Reload page
+              {i18n.t('settings.reloadPage')}
             </Button>
           </div>
         </div>
@@ -93,6 +99,7 @@ class SectionErrorBoundary extends Component<
 
 // Inner component that uses context
 function SettingsPageInner() {
+  const { t } = useTranslation();
   const { activeTab, setActiveTab } = useSettingsTab();
   const {
     rawConfig,
@@ -178,12 +185,12 @@ function SettingsPageInner() {
                   {copied ? (
                     <>
                       <Check className="w-4 h-4 mr-1" />
-                      Copied
+                      {t('settings.copied')}
                     </>
                   ) : (
                     <>
                       <Copy className="w-4 h-4 mr-1" />
-                      Copy
+                      {t('settings.copy')}
                     </>
                   )}
                 </Button>
@@ -203,7 +210,7 @@ function SettingsPageInner() {
               {rawConfigLoading ? (
                 <div className="flex items-center justify-center h-full text-muted-foreground">
                   <RefreshCw className="w-5 h-5 animate-spin mr-2" />
-                  Loading...
+                  {t('settings.loading')}
                 </div>
               ) : rawConfig ? (
                 <CodeEditor
@@ -218,7 +225,7 @@ function SettingsPageInner() {
                 <div className="flex items-center justify-center h-full text-muted-foreground">
                   <div className="text-center">
                     <FileCode className="w-12 h-12 mx-auto mb-3 opacity-30" />
-                    <p>Config file not found</p>
+                    <p>{t('settings.configFileNotFound')}</p>
                     <code className="text-sm bg-muted px-2 py-1 rounded mt-2 inline-block">
                       ccs migrate
                     </code>

ui/src/pages/settings/sections/auth-section.tsx

@@ -23,6 +23,7 @@ import {
   Save,
 } from 'lucide-react';
 import { useRawConfig } from '../hooks';
+import { useTranslation } from 'react-i18next';
 
 interface TokenInfo {
   value: string;
@@ -35,6 +36,7 @@ interface AuthTokens {
 }
 
 export default function AuthSection() {
+  const { t } = useTranslation();
   const { fetchRawConfig } = useRawConfig();
 
   // State
@@ -60,16 +62,16 @@ export default function AuthSection() {
       // Use /raw to get unmasked values for editing
       const response = await fetch('/api/settings/auth/tokens/raw');
       if (!response.ok) {
-        throw new Error('Failed to fetch auth tokens');
+        throw new Error(t('settingsAuth.failedFetchTokens'));
       }
       const data = await response.json();
       setTokens(data);
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Unknown error');
+      setError(err instanceof Error ? err.message : t('settings.unknownError'));
     } finally {
       setLoading(false);
     }
-  }, []);
+  }, [t]);
 
   // Load on mount
   useEffect(() => {
@@ -117,16 +119,16 @@ export default function AuthSection() {
 
       if (!response.ok) {
         const data = await response.json();
-        throw new Error(data.error || 'Failed to save tokens');
+        throw new Error(data.error || t('settingsAuth.failedSaveTokens'));
       }
 
-      setSuccess('Tokens updated. Restart CLIProxy to apply.');
+      setSuccess(t('settingsAuth.tokensUpdated'));
       setEditedApiKey(null);
       setEditedSecret(null);
       await fetchTokens();
       await fetchRawConfig();
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Unknown error');
+      setError(err instanceof Error ? err.message : t('settings.unknownError'));
     } finally {
       setSaving(false);
     }
@@ -143,14 +145,14 @@ export default function AuthSection() {
 
       if (!response.ok) {
         const data = await response.json();
-        throw new Error(data.error || 'Failed to regenerate secret');
+        throw new Error(data.error || t('settingsAuth.failedRegenerate'));
       }
 
-      setSuccess('New management secret generated. Restart CLIProxy to apply.');
+      setSuccess(t('settingsAuth.secretRegenerated'));
       await fetchTokens();
       await fetchRawConfig();
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Unknown error');
+      setError(err instanceof Error ? err.message : t('settings.unknownError'));
     } finally {
       setSaving(false);
     }
@@ -167,16 +169,16 @@ export default function AuthSection() {
 
       if (!response.ok) {
         const data = await response.json();
-        throw new Error(data.error || 'Failed to reset tokens');
+        throw new Error(data.error || t('settingsAuth.failedReset'));
       }
 
-      setSuccess('Tokens reset to defaults. Restart CLIProxy to apply.');
+      setSuccess(t('settingsAuth.tokensReset'));
       setEditedApiKey(null);
       setEditedSecret(null);
       await fetchTokens();
       await fetchRawConfig();
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Unknown error');
+      setError(err instanceof Error ? err.message : t('settings.unknownError'));
     } finally {
       setSaving(false);
     }
@@ -209,7 +211,7 @@ export default function AuthSection() {
       <div className="flex-1 flex items-center justify-center">
         <div className="flex items-center gap-3 text-muted-foreground">
           <RefreshCw className="w-5 h-5 animate-spin" />
-          <span>Loading...</span>
+          <span>{t('settings.loading')}</span>
         </div>
       </div>
     );
@@ -251,31 +253,27 @@ export default function AuthSection() {
       {/* Scrollable Content */}
       <ScrollArea className="flex-1">
         <div className="p-5 space-y-6">
-          <p className="text-sm text-muted-foreground">
-            Configure CLIProxy authentication tokens. Changes require CLIProxy restart.
-          </p>
+          <p className="text-sm text-muted-foreground">{t('settingsAuth.description')}</p>
 
           {/* API Key Section */}
           <div className="space-y-3">
             <div className="flex items-center gap-2">
               <KeyRound className="w-4 h-4 text-primary" />
-              <h3 className="text-base font-medium">API Key</h3>
+              <h3 className="text-base font-medium">{t('settingsAuth.apiKey')}</h3>
               {tokens.apiKey.isCustom && (
                 <span className="text-xs px-2 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-900/50 dark:text-amber-300">
-                  Custom
+                  {t('settingsAuth.custom')}
                 </span>
               )}
             </div>
-            <p className="text-xs text-muted-foreground">
-              Used by Claude Code to authenticate with CLIProxy
-            </p>
+            <p className="text-xs text-muted-foreground">{t('settingsAuth.apiKeyDesc')}</p>
             <div className="flex gap-2">
               <div className="relative flex-1">
                 <Input
                   type={showApiKey ? 'text' : 'password'}
                   value={displayApiKey}
                   onChange={(e) => setEditedApiKey(e.target.value)}
-                  placeholder="API key"
+                  placeholder={t('settingsAuth.apiKeyPlaceholder')}
                   disabled={saving}
                   className="pr-20 font-mono text-sm"
                 />
@@ -310,15 +308,15 @@ export default function AuthSection() {
           <div className="space-y-3">
             <div className="flex items-center gap-2">
               <ShieldCheck className="w-4 h-4 text-primary" />
-              <h3 className="text-base font-medium">Management Secret</h3>
+              <h3 className="text-base font-medium">{t('settingsAuth.managementSecret')}</h3>
               {tokens.managementSecret.isCustom && (
                 <span className="text-xs px-2 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-900/50 dark:text-amber-300">
-                  Custom
+                  {t('settingsAuth.custom')}
                 </span>
               )}
             </div>
             <p className="text-xs text-muted-foreground">
-              Used by CCS dashboard to access CLIProxy management APIs
+              {t('settingsAuth.managementSecretDesc')}
             </p>
             <div className="flex gap-2">
               <div className="relative flex-1">
@@ -326,7 +324,7 @@ export default function AuthSection() {
                   type={showSecret ? 'text' : 'password'}
                   value={displaySecret}
                   onChange={(e) => setEditedSecret(e.target.value)}
-                  placeholder="Management secret"
+                  placeholder={t('settingsAuth.managementSecretPlaceholder')}
                   disabled={saving}
                   className="pr-20 font-mono text-sm"
                 />
@@ -359,7 +357,7 @@ export default function AuthSection() {
                 size="sm"
                 onClick={regenerateSecret}
                 disabled={saving}
-                title="Generate new secure secret"
+                title={t('settingsAuth.generateSecret')}
               >
                 <Sparkles className="w-4 h-4" />
               </Button>
@@ -375,11 +373,9 @@ export default function AuthSection() {
               className="gap-2"
             >
               <RotateCcw className="w-4 h-4" />
-              Reset to Defaults
+              {t('settingsAuth.resetDefaults')}
             </Button>
-            <p className="text-xs text-muted-foreground mt-2">
-              Resets both API key and management secret to their default values.
-            </p>
+            <p className="text-xs text-muted-foreground mt-2">{t('settingsAuth.resetDesc')}</p>
           </div>
         </div>
       </ScrollArea>
@@ -394,7 +390,7 @@ export default function AuthSection() {
           className="flex-1"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
         <Button
           variant="default"
@@ -404,7 +400,7 @@ export default function AuthSection() {
           className="flex-1"
         >
           <Save className={`w-4 h-4 mr-2 ${saving ? 'animate-pulse' : ''}`} />
-          {saving ? 'Saving...' : 'Save'}
+          {saving ? t('settingsAuth.saving') : t('settingsAuth.save')}
         </Button>
       </div>
     </>

ui/src/pages/settings/sections/backups-section.tsx

@@ -22,6 +22,7 @@ import {
 } from '@/components/ui/alert-dialog';
 import { RefreshCw, CheckCircle2, AlertCircle, RotateCcw, Clock, Archive } from 'lucide-react';
 import { useRawConfig } from '../hooks';
+import { useTranslation } from 'react-i18next';
 
 /** Duration in ms before success toast auto-dismisses */
 const SUCCESS_DISPLAY_DURATION_MS = 3000;
@@ -39,6 +40,7 @@ interface BackupsResponse {
 }
 
 export default function BackupsSection() {
+  const { t } = useTranslation();
   const { fetchRawConfig } = useRawConfig();
 
   // AbortController refs for cleanup
@@ -66,18 +68,18 @@ export default function BackupsSection() {
         signal: abortControllerRef.current.signal,
       });
       if (!response.ok) {
-        throw new Error('Failed to fetch backups');
+        throw new Error(t('settingsBackups.failedFetch'));
       }
       const data: BackupsResponse = await response.json();
       setBackups(data.backups || []);
     } catch (err) {
       // Ignore abort errors
       if (err instanceof Error && err.name === 'AbortError') return;
-      setError(err instanceof Error ? err.message : 'Unknown error');
+      setError(err instanceof Error ? err.message : t('settings.unknownError'));
     } finally {
       setLoading(false);
     }
-  }, []);
+  }, [t]);
 
   // Restore backup (wrapped in useCallback for callback stability)
   const restoreBackup = useCallback(
@@ -98,21 +100,21 @@ export default function BackupsSection() {
 
         if (!response.ok) {
           const data = await response.json();
-          throw new Error(data.error || 'Failed to restore backup');
+          throw new Error(data.error || t('settingsBackups.failedRestore'));
         }
 
-        setSuccess('Backup restored successfully');
+        setSuccess(t('settingsBackups.restoreSuccess'));
         await fetchBackups();
         await fetchRawConfig();
       } catch (err) {
         // Ignore abort errors
         if (err instanceof Error && err.name === 'AbortError') return;
-        setError(err instanceof Error ? err.message : 'Unknown error');
+        setError(err instanceof Error ? err.message : t('settings.unknownError'));
       } finally {
         setRestoring(null);
       }
     },
-    [fetchBackups, fetchRawConfig]
+    [fetchBackups, fetchRawConfig, t]
   );
 
   // Load on mount
@@ -205,12 +207,9 @@ export default function BackupsSection() {
           <div>
             <div className="flex items-center gap-2 mb-2">
               <Archive className="w-5 h-5 text-primary" />
-              <h2 className="text-lg font-semibold">Settings Backups</h2>
+              <h2 className="text-lg font-semibold">{t('settingsBackups.title')}</h2>
             </div>
-            <p className="text-sm text-muted-foreground">
-              Restore previous versions of your settings.json file. Backups are created
-              automatically when settings are modified.
-            </p>
+            <p className="text-sm text-muted-foreground">{t('settingsBackups.description')}</p>
           </div>
 
           {/* Backups List */}
@@ -218,9 +217,9 @@ export default function BackupsSection() {
             <Card className="p-8">
               <div className="text-center">
                 <Archive className="w-12 h-12 mx-auto mb-3 opacity-30 text-muted-foreground" />
-                <p className="text-sm text-muted-foreground">No backups available</p>
+                <p className="text-sm text-muted-foreground">{t('settingsBackups.none')}</p>
                 <p className="text-xs text-muted-foreground mt-1">
-                  Backups will appear here when you modify settings
+                  {t('settingsBackups.noneHint')}
                 </p>
               </div>
             </Card>
@@ -236,7 +235,7 @@ export default function BackupsSection() {
                           <p className="text-sm font-medium font-mono">{backup.timestamp}</p>
                           {index === 0 && (
                             <Badge variant="secondary" className="text-xs">
-                              Latest
+                              {t('settingsBackups.latest')}
                             </Badge>
                           )}
                         </div>
@@ -253,7 +252,9 @@ export default function BackupsSection() {
                       <RotateCcw
                         className={`w-4 h-4 ${restoring === backup.timestamp ? 'animate-spin' : ''}`}
                       />
-                      {restoring === backup.timestamp ? 'Restoring...' : 'Restore'}
+                      {restoring === backup.timestamp
+                        ? t('settingsBackups.restoring')
+                        : t('settingsBackups.restore')}
                     </Button>
                   </div>
                 </Card>
@@ -276,7 +277,7 @@ export default function BackupsSection() {
           className="w-full"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
       </div>
 
@@ -284,17 +285,17 @@ export default function BackupsSection() {
       <AlertDialog open={!!confirmRestore} onOpenChange={() => setConfirmRestore(null)}>
         <AlertDialogContent>
           <AlertDialogHeader>
-            <AlertDialogTitle>Restore Backup?</AlertDialogTitle>
+            <AlertDialogTitle>{t('settingsBackups.restoreConfirmTitle')}</AlertDialogTitle>
             <AlertDialogDescription>
-              This will replace your current settings with backup from{' '}
+              {t('settingsBackups.restoreConfirmPrefix')}{' '}
               <code className="font-mono bg-muted px-1.5 py-0.5 rounded text-foreground">
                 {confirmRestore}
               </code>
-              . This action cannot be undone.
+              . {t('settingsBackups.restoreConfirmSuffix')}
             </AlertDialogDescription>
           </AlertDialogHeader>
           <AlertDialogFooter>
-            <AlertDialogCancel>Cancel</AlertDialogCancel>
+            <AlertDialogCancel>{t('settingsBackups.cancel')}</AlertDialogCancel>
             <AlertDialogAction
               onClick={() => {
                 if (confirmRestore) {
@@ -303,7 +304,7 @@ export default function BackupsSection() {
                 setConfirmRestore(null);
               }}
             >
-              Restore
+              {t('settingsBackups.restore')}
             </AlertDialogAction>
           </AlertDialogFooter>
         </AlertDialogContent>

ui/src/pages/settings/sections/globalenv-section.tsx

@@ -11,8 +11,10 @@ import { Switch } from '@/components/ui/switch';
 import { Input } from '@/components/ui/input';
 import { RefreshCw, CheckCircle2, AlertCircle, Plus, Trash2 } from 'lucide-react';
 import { useGlobalEnvConfig, useRawConfig } from '../hooks';
+import { useTranslation } from 'react-i18next';
 
 export default function GlobalEnvSection() {
+  const { t } = useTranslation();
   const {
     config,
     loading,
@@ -46,7 +48,7 @@ export default function GlobalEnvSection() {
       <div className="flex-1 flex items-center justify-center">
         <div className="flex items-center gap-3 text-muted-foreground">
           <RefreshCw className="w-5 h-5 animate-spin" />
-          <span>Loading...</span>
+          <span>{t('settings.loading')}</span>
         </div>
       </div>
     );
@@ -71,7 +73,7 @@ export default function GlobalEnvSection() {
         {success && (
           <div className="flex items-center gap-2 px-3 py-2 rounded-md border border-green-200 bg-green-50 text-green-700 shadow-lg dark:border-green-900/50 dark:bg-green-900/90 dark:text-green-300">
             <CheckCircle2 className="h-4 w-4 shrink-0" />
-            <span className="text-sm font-medium">Saved</span>
+            <span className="text-sm font-medium">{t('settings.saved')}</span>
           </div>
         )}
       </div>
@@ -79,21 +81,18 @@ export default function GlobalEnvSection() {
       {/* Scrollable Content */}
       <ScrollArea className="flex-1">
         <div className="p-5 space-y-6">
-          <p className="text-sm text-muted-foreground">
-            Environment variables injected into all non-Claude subscription profiles (gemini, codex,
-            agy, ghcp, etc.)
-          </p>
+          <p className="text-sm text-muted-foreground">{t('settingsGlobalEnv.description')}</p>
 
           {/* Enable/Disable Toggle */}
           <div className="flex items-center justify-between p-4 rounded-lg bg-muted/50">
             <div>
               <p className="font-medium">
-                {config?.enabled ? 'Global Env enabled' : 'Global Env disabled'}
+                {config?.enabled ? t('settingsGlobalEnv.enabled') : t('settingsGlobalEnv.disabled')}
               </p>
               <p className="text-sm text-muted-foreground">
                 {config?.enabled
-                  ? 'Env vars will be injected into third-party profiles'
-                  : 'Env vars will not be injected'}
+                  ? t('settingsGlobalEnv.enabledDesc')
+                  : t('settingsGlobalEnv.disabledDesc')}
               </p>
             </div>
             <Switch checked={config?.enabled ?? true} onCheckedChange={toggleGlobalEnv} />
@@ -101,7 +100,7 @@ export default function GlobalEnvSection() {
 
           {/* Current Environment Variables */}
           <div className="space-y-3">
-            <h3 className="text-base font-medium">Environment Variables</h3>
+            <h3 className="text-base font-medium">{t('settingsGlobalEnv.envVars')}</h3>
 
             {config?.env && Object.keys(config.env).length > 0 ? (
               <div className="space-y-2">
@@ -127,18 +126,18 @@ export default function GlobalEnvSection() {
               </div>
             ) : (
               <div className="p-4 rounded-lg border border-dashed text-center text-muted-foreground">
-                <p>No environment variables configured</p>
+                <p>{t('settingsGlobalEnv.noneConfigured')}</p>
               </div>
             )}
 
             {/* Add New Variable */}
             <div className="p-4 rounded-lg border bg-muted/30">
-              <h4 className="text-sm font-medium mb-3">Add New Variable</h4>
+              <h4 className="text-sm font-medium mb-3">{t('settingsGlobalEnv.addNew')}</h4>
               <div className="flex gap-2">
                 <Input
                   value={newEnvKey}
                   onChange={(e) => setNewEnvKey(e.target.value.toUpperCase())}
-                  placeholder="KEY_NAME"
+                  placeholder={t('settingsGlobalEnv.keyName')}
                   className="flex-1 font-mono text-sm h-9"
                   disabled={saving}
                 />
@@ -146,7 +145,7 @@ export default function GlobalEnvSection() {
                 <Input
                   value={newEnvValue}
                   onChange={(e) => setNewEnvValue(e.target.value)}
-                  placeholder="value"
+                  placeholder={t('settingsGlobalEnv.value')}
                   className="flex-1 font-mono text-sm h-9"
                   disabled={saving}
                 />
@@ -157,14 +156,14 @@ export default function GlobalEnvSection() {
                   className="h-9"
                 >
                   <Plus className="w-4 h-4 mr-1" />
-                  Add
+                  {t('settingsGlobalEnv.add')}
                 </Button>
               </div>
             </div>
 
             {/* Common Variables Quick Add */}
             <div className="p-4 rounded-lg border bg-muted/30">
-              <h4 className="text-sm font-medium mb-3">Quick Add Common Variables</h4>
+              <h4 className="text-sm font-medium mb-3">{t('settingsGlobalEnv.quickAdd')}</h4>
               <div className="flex flex-wrap gap-2">
                 {[
                   { key: 'DISABLE_BUG_COMMAND', value: '1' },
@@ -192,7 +191,7 @@ export default function GlobalEnvSection() {
                     (k) => config.env[k]
                   ) && (
                     <span className="text-sm text-muted-foreground">
-                      All common variables are configured
+                      {t('settingsGlobalEnv.allConfigured')}
                     </span>
                   )}
               </div>
@@ -214,7 +213,7 @@ export default function GlobalEnvSection() {
           className="w-full"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
       </div>
     </>

ui/src/pages/settings/sections/proxy/index.tsx

@@ -30,6 +30,7 @@ import { api } from '@/lib/api-client';
 import { CLIPROXY_DEFAULT_PORT } from '@/lib/preset-utils';
 import { RISK_ACK_PHRASE } from '@/components/account/antigravity-responsibility-constants';
 import { toast } from 'sonner';
+import { useTranslation } from 'react-i18next';
 
 /** LocalStorage key for debug mode preference */
 const DEBUG_MODE_KEY = 'ccs_debug_mode';
@@ -42,6 +43,7 @@ function normalizeRiskAckPhrase(value: string): string {
 }
 
 export default function ProxySection() {
+  const { t } = useTranslation();
   const {
     config,
     loading,
@@ -98,17 +100,17 @@ export default function ProxySection() {
       setAgyAckBypassLoading(true);
       const response = await fetch('/api/settings/auth/antigravity-risk');
       if (!response.ok) {
-        throw new Error('Failed to load AGY power user mode');
+        throw new Error(t('settingsProxy.failedLoadAgyMode'));
       }
       const data = (await response.json()) as { antigravityAckBypass?: boolean };
       setAgyAckBypass(data.antigravityAckBypass === true);
     } catch (err) {
-      toast.error(err instanceof Error ? err.message : 'Failed to load AGY power user mode');
+      toast.error(err instanceof Error ? err.message : t('settingsProxy.failedLoadAgyMode'));
       setAgyAckBypass(false);
     } finally {
       setAgyAckBypassLoading(false);
     }
-  }, []);
+  }, [t]);
 
   const persistAgyAckBypass = useCallback(
     async (nextValue: boolean) => {
@@ -130,7 +132,7 @@ export default function ProxySection() {
         };
 
         if (!response.ok) {
-          throw new Error(payload.error || 'Failed to update AGY power user mode');
+          throw new Error(payload.error || t('settingsProxy.failedUpdateAgyMode'));
         }
 
         const persistedValue = payload.antigravityAckBypass === true;
@@ -139,29 +141,29 @@ export default function ProxySection() {
           cache: 'no-store',
         });
         if (!verifyResponse.ok) {
-          throw new Error('Failed to verify AGY power user mode persistence');
+          throw new Error(t('settingsProxy.failedVerifyAgyMode'));
         }
         const verifyData = (await verifyResponse.json()) as { antigravityAckBypass?: boolean };
         const verifiedValue = verifyData.antigravityAckBypass === true;
         if (verifiedValue !== nextValue) {
-          throw new Error(
-            'AGY power user mode was not persisted. Config may have been modified by another process.'
-          );
+          throw new Error(t('settingsProxy.notPersistedAgyMode'));
         }
 
         setAgyAckBypass(verifiedValue && persistedValue);
         setShowAgyEnableConfirm(false);
         setAgyEnableConfirmPhrase('');
-        toast.success(nextValue ? 'AGY power user mode enabled.' : 'AGY power user mode disabled.');
+        toast.success(
+          nextValue ? t('settingsProxy.agyModeEnabled') : t('settingsProxy.agyModeDisabled')
+        );
         await fetchRawConfig();
       } catch (err) {
-        toast.error(err instanceof Error ? err.message : 'Failed to update AGY power user mode');
+        toast.error(err instanceof Error ? err.message : t('settingsProxy.failedUpdateAgyMode'));
       } finally {
         agyAckBypassSavingRef.current = false;
         setAgyAckBypassSaving(false);
       }
     },
-    [agyAckBypassSaving, fetchRawConfig, saving]
+    [agyAckBypassSaving, fetchRawConfig, saving, t]
   );
 
   const handleAgyAckBypassChange = useCallback(
@@ -182,11 +184,11 @@ export default function ProxySection() {
 
   const confirmAgyEnable = useCallback(() => {
     if (!isAgyConfirmPhraseValid) {
-      toast.error(`Type "${RISK_ACK_PHRASE}" to continue.`);
+      toast.error(t('settingsProxy.typePhraseToContinue', { value: RISK_ACK_PHRASE }));
       return;
     }
     void persistAgyAckBypass(true);
-  }, [isAgyConfirmPhraseValid, persistAgyAckBypass]);
+  }, [isAgyConfirmPhraseValid, persistAgyAckBypass, t]);
 
   // Backend state (loaded from API) + mutation hook for proper query invalidation
   const [backend, setBackend] = useState<'original' | 'plus'>('plus');
@@ -262,7 +264,7 @@ export default function ProxySection() {
       <div className="flex-1 flex items-center justify-center">
         <div className="flex items-center gap-3 text-muted-foreground">
           <RefreshCw className="w-5 h-5 animate-spin" />
-          <span>Loading...</span>
+          <span>{t('settings.loading')}</span>
         </div>
       </div>
     );
@@ -308,7 +310,7 @@ export default function ProxySection() {
 
     const parsedPort = Number(portStr);
     if (!Number.isInteger(parsedPort) || parsedPort < 1 || parsedPort > 65535) {
-      toast.error('Port must be an integer between 1 and 65535, or empty for default');
+      toast.error(t('settingsProxy.invalidPortOrEmpty'));
       setEditedPort(null);
       return;
     }
@@ -340,7 +342,7 @@ export default function ProxySection() {
     const parsedPort = localPortStr === '' ? CLIPROXY_DEFAULT_PORT : Number(localPortStr);
 
     if (!Number.isInteger(parsedPort) || parsedPort < 1 || parsedPort > 65535) {
-      toast.error('Local port must be an integer between 1 and 65535');
+      toast.error(t('settingsProxy.invalidLocalPort'));
       setEditedLocalPort(null);
       return;
     }
@@ -379,7 +381,7 @@ export default function ProxySection() {
         {success && (
           <div className="flex items-center gap-2 px-3 py-2 rounded-md border border-green-200 bg-green-50 text-green-700 shadow-lg dark:border-green-900/50 dark:bg-green-900/90 dark:text-green-300">
             <CheckCircle2 className="h-4 w-4 shrink-0" />
-            <span className="text-sm font-medium">Saved</span>
+            <span className="text-sm font-medium">{t('settings.saved')}</span>
           </div>
         )}
       </div>
@@ -388,21 +390,23 @@ export default function ProxySection() {
       <ScrollArea className="flex-1">
         <div className="p-5 space-y-6">
           <p className="text-sm text-muted-foreground">
-            Configure local or remote {backend === 'plus' ? 'CLIProxy Plus' : 'CLIProxy'} connection
-            for proxy-based profiles
+            {t('settingsProxy.description', {
+              backend:
+                backend === 'plus' ? t('settingsProxy.backendPlus') : t('settingsProxy.backend'),
+            })}
           </p>
 
           {/* Proxy Status Widget - Quick access to start/stop controls */}
           {!isRemoteMode && (
             <div className="space-y-3">
-              <h3 className="text-base font-medium">Instance Status</h3>
+              <h3 className="text-base font-medium">{t('settingsProxy.instanceStatus')}</h3>
               <ProxyStatusWidget />
             </div>
           )}
 
           {/* Mode Toggle - Card based selection */}
           <div className="space-y-3">
-            <h3 className="text-base font-medium">Connection Mode</h3>
+            <h3 className="text-base font-medium">{t('settingsProxy.connectionMode')}</h3>
             <div className="grid grid-cols-2 gap-3">
               {/* Local Mode Card */}
               <button
@@ -418,10 +422,15 @@ export default function ProxySection() {
                   <Laptop
                     className={`w-5 h-5 ${!isRemoteMode ? 'text-primary' : 'text-muted-foreground'}`}
                   />
-                  <span className="font-medium">Local</span>
+                  <span className="font-medium">{t('settingsProxy.local')}</span>
                 </div>
                 <p className="text-xs text-muted-foreground">
-                  Run {backend === 'plus' ? 'CLIProxy Plus' : 'CLIProxy'} binary on this machine
+                  {t('settingsProxy.localDesc', {
+                    backend:
+                      backend === 'plus'
+                        ? t('settingsProxy.backendPlus')
+                        : t('settingsProxy.backend'),
+                  })}
                 </p>
               </button>
 
@@ -439,10 +448,15 @@ export default function ProxySection() {
                   <Cloud
                     className={`w-5 h-5 ${isRemoteMode ? 'text-primary' : 'text-muted-foreground'}`}
                   />
-                  <span className="font-medium">Remote</span>
+                  <span className="font-medium">{t('settingsProxy.remote')}</span>
                 </div>
                 <p className="text-xs text-muted-foreground">
-                  Connect to a remote {backend === 'plus' ? 'CLIProxy Plus' : 'CLIProxy'} server
+                  {t('settingsProxy.remoteDesc', {
+                    backend:
+                      backend === 'plus'
+                        ? t('settingsProxy.backendPlus')
+                        : t('settingsProxy.backend'),
+                  })}
                 </p>
               </button>
             </div>
@@ -452,14 +466,14 @@ export default function ProxySection() {
           <div className="space-y-3">
             <h3 className="text-base font-medium flex items-center gap-2">
               <Box className="w-4 h-4" />
-              Backend Binary
+              {t('settingsProxy.backendBinary')}
             </h3>
             {/* Warning when local proxy is running - must stop to change backend (not applicable in remote mode) */}
             {!isRemoteMode && isProxyRunning && (
               <Alert className="py-2 border-amber-200 bg-amber-50 dark:border-amber-900/50 dark:bg-amber-900/20 [&>svg]:top-2.5">
                 <AlertTriangle className="h-4 w-4 text-amber-600" />
                 <AlertDescription className="text-amber-700 dark:text-amber-400">
-                  Stop the running proxy in Instance Status to switch backend.
+                  {t('settingsProxy.stopProxyToSwitch')}
                 </AlertDescription>
               </Alert>
             )}
@@ -475,14 +489,12 @@ export default function ProxySection() {
                 } ${isBackendSwitchBlocked ? 'opacity-60 cursor-not-allowed' : ''}`}
               >
                 <div className="flex items-center gap-3 mb-2">
-                  <span className="font-medium">CLIProxyAPIPlus</span>
+                  <span className="font-medium">{t('settingsProxy.backendPlusApi')}</span>
                   <span className="text-xs px-1.5 py-0.5 rounded bg-green-100 text-green-700 dark:bg-green-900/50 dark:text-green-400">
-                    Default
+                    {t('settingsProxy.default')}
                   </span>
                 </div>
-                <p className="text-xs text-muted-foreground">
-                  Full provider support including Kiro and GitHub Copilot
-                </p>
+                <p className="text-xs text-muted-foreground">{t('settingsProxy.plusDesc')}</p>
               </button>
 
               {/* Original Backend Card */}
@@ -496,21 +508,16 @@ export default function ProxySection() {
                 } ${isBackendSwitchBlocked ? 'opacity-60 cursor-not-allowed' : ''}`}
               >
                 <div className="flex items-center gap-3 mb-2">
-                  <span className="font-medium">CLIProxyAPI</span>
+                  <span className="font-medium">{t('settingsProxy.backendApi')}</span>
                 </div>
-                <p className="text-xs text-muted-foreground">
-                  Original binary (Gemini, Codex, Antigravity only)
-                </p>
+                <p className="text-xs text-muted-foreground">{t('settingsProxy.originalDesc')}</p>
               </button>
             </div>
             {/* Warning when original backend selected with Kiro/ghcp variants */}
             {backend === 'original' && hasKiroGhcpVariants && (
               <Alert variant="destructive" className="py-2">
                 <AlertTriangle className="h-4 w-4" />
-                <AlertDescription>
-                  Existing Kiro/Copilot variants will not work with CLIProxyAPI. Switch to
-                  CLIProxyAPIPlus or remove those variants.
-                </AlertDescription>
+                <AlertDescription>{t('settingsProxy.variantsIncompatible')}</AlertDescription>
               </Alert>
             )}
           </div>
@@ -519,15 +526,13 @@ export default function ProxySection() {
           <div className="space-y-3">
             <h3 className="text-base font-medium flex items-center gap-2">
               <ShieldAlert className="w-4 h-4 text-amber-700 dark:text-amber-300" />
-              Safety
+              {t('settingsProxy.safety')}
             </h3>
             <div className="space-y-3 rounded-lg border border-amber-400/35 bg-amber-50/70 p-4 dark:border-amber-800/60 dark:bg-amber-950/25">
               <div className="flex items-start justify-between gap-4">
                 <div className="space-y-1">
-                  <p className="font-medium text-sm">Antigravity Power User Mode</p>
-                  <p className="text-xs text-muted-foreground">
-                    Skip AGY responsibility checklist in Add Account and `ccs agy` flows.
-                  </p>
+                  <p className="font-medium text-sm">{t('settingsProxy.agyModeTitle')}</p>
+                  <p className="text-xs text-muted-foreground">{t('settingsProxy.agyModeDesc')}</p>
                 </div>
                 <Switch
                   aria-labelledby="agy-power-user-mode-label"
@@ -541,24 +546,22 @@ export default function ProxySection() {
                 id="agy-power-user-mode-description"
                 className="text-xs text-amber-800/90 dark:text-amber-200/90"
               >
-                Use only if you fully understand the OAuth suspension/ban risk pattern (#509). CCS
-                cannot assume responsibility for account loss.
+                {t('settingsProxy.agyWarning')}
               </p>
               {showAgyEnableConfirm && (
                 <div className="space-y-3 rounded-lg border border-rose-500/40 bg-rose-500/[0.08] p-3.5">
                   <div className="space-y-1.5">
                     <p className="text-xs font-semibold tracking-wide text-rose-900 dark:text-rose-200">
-                      Final confirmation required
+                      {t('settingsProxy.finalConfirm')}
                     </p>
                     <p className="text-xs leading-relaxed text-rose-800/95 dark:text-rose-200/90">
-                      Enabling this will skip AGY safety checkpoints in both dashboard and CLI.
-                      Review issue #509 and type the exact phrase to proceed.
+                      {t('settingsProxy.finalConfirmDesc')}
                     </p>
                   </div>
                   <div className="grid gap-2 md:grid-cols-2">
                     <div className="rounded-md border border-rose-400/30 bg-rose-500/10 p-2.5">
                       <p className="text-[11px] font-semibold uppercase tracking-wide text-rose-900 dark:text-rose-200">
-                        Step 1
+                        {t('settingsProxy.step1')}
                       </p>
                       <a
                         href="https://github.com/kaitranntt/ccs/issues/509"
@@ -566,20 +569,20 @@ export default function ProxySection() {
                         rel="noreferrer"
                         className="mt-1 inline-flex items-center gap-1.5 text-xs font-medium text-rose-800 underline decoration-rose-500/60 underline-offset-2 transition-colors hover:text-rose-700 dark:text-rose-200"
                       >
-                        Read issue #509
+                        {t('settingsProxy.readIssue')}
                         <ExternalLink className="h-3.5 w-3.5" />
                       </a>
                     </div>
                     <div className="rounded-md border border-rose-400/30 bg-rose-500/10 p-2.5">
                       <p className="text-[11px] font-semibold uppercase tracking-wide text-rose-900 dark:text-rose-200">
-                        Step 2
+                        {t('settingsProxy.step2')}
                       </p>
                       <p className="mt-1 text-xs text-rose-800/95 dark:text-rose-200/90">
-                        Type{' '}
+                        {t('settingsProxy.typePrefix')}{' '}
                         <code className="rounded bg-background/80 px-1 py-0.5 font-mono">
                           {RISK_ACK_PHRASE}
                         </code>{' '}
-                        to enable.
+                        {t('settingsProxy.typeSuffix')}
                       </p>
                     </div>
                   </div>
@@ -590,10 +593,10 @@ export default function ProxySection() {
                       placeholder={RISK_ACK_PHRASE}
                       disabled={agyAckBypassSaving || saving}
                       className="font-mono text-xs"
-                      aria-label="Type I ACCEPT RISK to enable Antigravity power user mode"
+                      aria-label={t('settingsProxy.typePhraseAria')}
                     />
                     <p className="text-[11px] text-rose-800/90 dark:text-rose-200/80">
-                      Exact phrase required.
+                      {t('settingsProxy.exactPhrase')}
                     </p>
                   </div>
                   <div className="flex items-center justify-end gap-2">
@@ -606,7 +609,7 @@ export default function ProxySection() {
                       }}
                       disabled={agyAckBypassSaving || saving}
                     >
-                      Cancel
+                      {t('settingsBackups.cancel')}
                     </Button>
                     <Button
                       size="sm"
@@ -614,13 +617,13 @@ export default function ProxySection() {
                       onClick={confirmAgyEnable}
                       disabled={!isAgyConfirmPhraseValid || agyAckBypassSaving || saving}
                     >
-                      Enable Power User Mode
+                      {t('settingsProxy.enableAgyMode')}
                     </Button>
                   </div>
                 </div>
               )}
               <span id="agy-power-user-mode-label" className="sr-only">
-                Toggle AGY power user mode
+                {t('settingsProxy.toggleAgyMode')}
               </span>
             </div>
           </div>
@@ -651,14 +654,14 @@ export default function ProxySection() {
 
           {/* Fallback Settings */}
           <div className="space-y-3">
-            <h3 className="text-base font-medium">Fallback Settings</h3>
+            <h3 className="text-base font-medium">{t('settingsProxy.fallbackSettings')}</h3>
             <div className="space-y-3 p-4 rounded-lg border bg-muted/30">
               {/* Enable Fallback */}
               <div className="flex items-center justify-between">
                 <div>
-                  <p className="font-medium text-sm">Enable fallback to local</p>
+                  <p className="font-medium text-sm">{t('settingsProxy.enableFallback')}</p>
                   <p className="text-xs text-muted-foreground">
-                    Use local proxy if remote is unreachable
+                    {t('settingsProxy.enableFallbackDesc')}
                   </p>
                 </div>
                 <Switch
@@ -673,9 +676,9 @@ export default function ProxySection() {
               {/* Auto-start on fallback */}
               <div className="flex items-center justify-between">
                 <div>
-                  <p className="font-medium text-sm">Auto-start local proxy</p>
+                  <p className="font-medium text-sm">{t('settingsProxy.autoStartLocal')}</p>
                   <p className="text-xs text-muted-foreground">
-                    Automatically start local proxy on fallback
+                    {t('settingsProxy.autoStartLocalDesc')}
                   </p>
                 </div>
                 <Switch
@@ -693,15 +696,15 @@ export default function ProxySection() {
           <div className="space-y-3">
             <h3 className="text-base font-medium flex items-center gap-2">
               <Bug className="w-4 h-4" />
-              Advanced
+              {t('settingsProxy.advanced')}
             </h3>
             <div className="space-y-3 p-4 rounded-lg border bg-muted/30">
               {/* Debug Mode Toggle */}
               <div className="flex items-center justify-between">
                 <div>
-                  <p className="font-medium text-sm">Debug Mode</p>
+                  <p className="font-medium text-sm">{t('settingsProxy.debugMode')}</p>
                   <p className="text-xs text-muted-foreground">
-                    Enable developer diagnostics in browser console
+                    {t('settingsProxy.debugModeDesc')}
                   </p>
                 </div>
                 <Switch
@@ -712,7 +715,7 @@ export default function ProxySection() {
               </div>
               {debugMode && (
                 <p className="text-xs text-amber-600 dark:text-amber-400 pl-0.5">
-                  Debug mode enabled. Check browser console for detailed logs.
+                  {t('settingsProxy.debugModeEnabled')}
                 </p>
               )}
             </div>
@@ -748,7 +751,7 @@ export default function ProxySection() {
           className="w-full"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
       </div>
     </>

ui/src/pages/settings/sections/proxy/local-proxy-card.tsx

@@ -7,6 +7,7 @@ import { Switch } from '@/components/ui/switch';
 import { Input } from '@/components/ui/input';
 import { CLIPROXY_DEFAULT_PORT } from '@/lib/preset-utils';
 import type { CliproxyServerConfig } from '../../types';
+import { useTranslation } from 'react-i18next';
 
 interface LocalProxyCardProps {
   config: CliproxyServerConfig;
@@ -25,15 +26,16 @@ export function LocalProxyCard({
   onSaveLocalPort,
   onSaveConfig,
 }: LocalProxyCardProps) {
+  const { t } = useTranslation();
   const localConfig = config.local;
 
   return (
     <div className="space-y-3">
-      <h3 className="text-base font-medium">Local Proxy</h3>
+      <h3 className="text-base font-medium">{t('settingsProxy.localProxy')}</h3>
       <div className="space-y-3 p-4 rounded-lg border bg-muted/30">
         {/* Port */}
         <div className="flex items-center gap-2">
-          <label className="text-sm text-muted-foreground">Port</label>
+          <label className="text-sm text-muted-foreground">{t('settingsProxy.port')}</label>
           <Input
             type="text"
             inputMode="numeric"
@@ -49,10 +51,8 @@ export function LocalProxyCard({
         {/* Auto-start */}
         <div className="flex items-center justify-between">
           <div>
-            <p className="font-medium text-sm">Auto-start</p>
-            <p className="text-xs text-muted-foreground">
-              Start local proxy automatically when needed
-            </p>
+            <p className="font-medium text-sm">{t('settingsProxy.autoStart')}</p>
+            <p className="text-xs text-muted-foreground">{t('settingsProxy.localAutoStartDesc')}</p>
           </div>
           <Switch
             checked={localConfig.auto_start ?? true}

ui/src/pages/settings/sections/proxy/remote-proxy-card.tsx

@@ -15,6 +15,7 @@ import {
 import { Cloud, RefreshCw, Wifi, WifiOff, CheckCircle2 } from 'lucide-react';
 import { CLIPROXY_DEFAULT_PORT } from '@/lib/preset-utils';
 import type { CliproxyServerConfig, RemoteProxyStatus } from '../../types';
+import { useTranslation } from 'react-i18next';
 
 interface RemoteProxyCardProps {
   config: CliproxyServerConfig;
@@ -57,6 +58,7 @@ export function RemoteProxyCard({
   onSaveConfig,
   onTestConnection,
 }: RemoteProxyCardProps) {
+  const { t } = useTranslation();
   const remoteConfig = config.remote;
 
   // HTTP defaults to 8317 (CLIProxyAPI default), HTTPS to 443 (standard SSL)
@@ -67,17 +69,17 @@ export function RemoteProxyCard({
     <div className="space-y-4 p-4 rounded-lg border bg-muted/30">
       <h4 className="text-sm font-medium flex items-center gap-2">
         <Cloud className="w-4 h-4" />
-        Remote Server Configuration
+        {t('settingsProxy.remoteConfigTitle')}
       </h4>
 
       {/* Host */}
       <div className="space-y-1">
-        <label className="text-sm text-muted-foreground">Host</label>
+        <label className="text-sm text-muted-foreground">{t('settingsProxy.host')}</label>
         <Input
           value={displayHost}
           onChange={(e) => setEditedHost(e.target.value)}
           onBlur={onSaveHost}
-          placeholder="192.168.1.100 or proxy.example.com"
+          placeholder={t('settingsProxy.hostPlaceholder')}
           className="font-mono"
           disabled={saving}
         />
@@ -87,9 +89,13 @@ export function RemoteProxyCard({
       <div className="grid grid-cols-2 gap-3">
         <div className="space-y-1">
           <label className="text-sm text-muted-foreground">
-            Port{' '}
+            {t('settingsProxy.port')}{' '}
             <span className="text-xs opacity-70">
-              (default: {getDefaultPort(config.remote.protocol || 'http')})
+              (
+              {t('settingsProxy.defaultPort', {
+                value: getDefaultPort(config.remote.protocol || 'http'),
+              })}
+              )
             </span>
           </label>
           <Input
@@ -98,13 +104,15 @@ export function RemoteProxyCard({
             value={displayPort}
             onChange={(e) => setEditedPort(e.target.value.replace(/\D/g, ''))}
             onBlur={onSavePort}
-            placeholder={`Leave empty for ${getDefaultPort(config.remote.protocol || 'http')}`}
+            placeholder={t('settingsProxy.portPlaceholder', {
+              value: getDefaultPort(config.remote.protocol || 'http'),
+            })}
             className="font-mono"
             disabled={saving}
           />
         </div>
         <div className="space-y-1">
-          <label className="text-sm text-muted-foreground">Protocol</label>
+          <label className="text-sm text-muted-foreground">{t('settingsProxy.protocol')}</label>
           <Select
             value={config.remote.protocol || 'http'}
             onValueChange={(value: 'http' | 'https') =>
@@ -116,8 +124,8 @@ export function RemoteProxyCard({
               <SelectValue />
             </SelectTrigger>
             <SelectContent>
-              <SelectItem value="http">HTTP</SelectItem>
-              <SelectItem value="https">HTTPS</SelectItem>
+              <SelectItem value="http">{t('settingsProxy.http')}</SelectItem>
+              <SelectItem value="https">{t('settingsProxy.https')}</SelectItem>
             </SelectContent>
           </Select>
         </div>
@@ -125,36 +133,34 @@ export function RemoteProxyCard({
 
       {/* Auth Token (API Key) */}
       <div className="space-y-1">
-        <label className="text-sm text-muted-foreground">API Key (optional)</label>
+        <label className="text-sm text-muted-foreground">{t('settingsProxy.apiKeyOptional')}</label>
         <Input
           type="password"
           value={displayAuthToken}
           onChange={(e) => setEditedAuthToken(e.target.value)}
           onBlur={onSaveAuthToken}
-          placeholder="For /v1/* API endpoints"
+          placeholder={t('settingsProxy.apiKeyPlaceholder')}
           className="font-mono"
           disabled={saving}
         />
-        <p className="text-xs text-muted-foreground">
-          Used for API requests to /v1/chat/completions
-        </p>
+        <p className="text-xs text-muted-foreground">{t('settingsProxy.apiKeyDesc')}</p>
       </div>
 
       {/* Management Key */}
       <div className="space-y-1">
-        <label className="text-sm text-muted-foreground">Management Key (optional)</label>
+        <label className="text-sm text-muted-foreground">
+          {t('settingsProxy.managementKeyOptional')}
+        </label>
         <Input
           type="password"
           value={displayManagementKey}
           onChange={(e) => setEditedManagementKey(e.target.value)}
           onBlur={onSaveManagementKey}
-          placeholder="For /v0/management/* endpoints"
+          placeholder={t('settingsProxy.managementKeyPlaceholder')}
           className="font-mono"
           disabled={saving}
         />
-        <p className="text-xs text-muted-foreground">
-          Used for dashboard management APIs. Falls back to API Key if not set.
-        </p>
+        <p className="text-xs text-muted-foreground">{t('settingsProxy.managementKeyDesc')}</p>
       </div>
 
       {/* Test Connection */}
@@ -168,12 +174,12 @@ export function RemoteProxyCard({
           {testing ? (
             <>
               <RefreshCw className="w-4 h-4 mr-2 animate-spin" />
-              Testing...
+              {t('settingsProxy.testing')}
             </>
           ) : (
             <>
               <Wifi className="w-4 h-4 mr-2" />
-              Test Connection
+              {t('settingsProxy.testConnection')}
             </>
           )}
         </Button>
@@ -192,14 +198,14 @@ export function RemoteProxyCard({
                 <>
                   <CheckCircle2 className="w-4 h-4 text-green-600 dark:text-green-400" />
                   <span className="text-sm font-medium text-green-700 dark:text-green-300">
-                    Connected ({testResult.latencyMs}ms)
+                    {t('settingsProxy.connectedLatency', { value: testResult.latencyMs })}
                   </span>
                 </>
               ) : (
                 <>
                   <WifiOff className="w-4 h-4 text-red-600 dark:text-red-400" />
                   <span className="text-sm font-medium text-red-700 dark:text-red-300">
-                    {testResult.error || 'Connection failed'}
+                    {testResult.error || t('settingsProxy.connectionFailed')}
                   </span>
                 </>
               )}

ui/src/pages/settings/sections/thinking/index.tsx

@@ -20,6 +20,7 @@ import {
 import { RefreshCw, CheckCircle2, AlertCircle, Brain, Info, ChevronDown } from 'lucide-react';
 import { useThinkingConfig } from '../../hooks';
 import type { ThinkingMode } from '../../types';
+import { useTranslation } from 'react-i18next';
 
 const THINKING_LEVELS = [
   { value: 'minimal', label: 'Minimal (512 tokens)' },
@@ -42,6 +43,7 @@ const THINKING_BUDGET_MIN = 0;
 const THINKING_BUDGET_MAX = 100000;
 
 export default function ThinkingSection() {
+  const { t } = useTranslation();
   const {
     config,
     loading,
@@ -125,7 +127,7 @@ export default function ThinkingSection() {
       <div className="flex-1 flex items-center justify-center">
         <div className="flex items-center gap-3 text-muted-foreground">
           <RefreshCw className="w-5 h-5 animate-spin" />
-          <span>Loading...</span>
+          <span>{t('settings.loading')}</span>
         </div>
       </div>
     );
@@ -156,7 +158,7 @@ export default function ThinkingSection() {
                 className="h-7 px-2 text-xs border-destructive/50 hover:bg-destructive/10"
               >
                 <RefreshCw className="w-3 h-3 mr-1" />
-                Retry
+                {t('sharedPage.retry')}
               </Button>
             </div>
           </Alert>
@@ -164,7 +166,7 @@ export default function ThinkingSection() {
         {success && (
           <div className="flex items-center gap-2 px-3 py-2 rounded-md border border-green-200 bg-green-50 text-green-700 shadow-lg dark:border-green-900/50 dark:bg-green-900/90 dark:text-green-300">
             <CheckCircle2 className="h-4 w-4 shrink-0" />
-            <span className="text-sm font-medium">Saved</span>
+            <span className="text-sm font-medium">{t('settings.saved')}</span>
           </div>
         )}
       </div>
@@ -174,27 +176,28 @@ export default function ThinkingSection() {
         <div className="p-5 space-y-6">
           <div className="flex items-center gap-3">
             <Brain className="w-5 h-5 text-primary" />
-            <p className="text-sm text-muted-foreground">
-              Configure extended thinking/reasoning for supported models.
-            </p>
+            <p className="text-sm text-muted-foreground">{t('settingsThinking.description')}</p>
           </div>
 
           {/* U4: Provider support indicator */}
           <div className="flex items-start gap-2 p-3 rounded-lg bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800">
             <Info className="w-4 h-4 text-blue-600 dark:text-blue-400 shrink-0 mt-0.5" />
             <div className="text-sm text-blue-700 dark:text-blue-300">
-              <p className="font-medium">Supported Providers</p>
+              <p className="font-medium">{t('settingsThinking.supportedProviders')}</p>
               <ul className="mt-1 space-y-0.5 text-blue-600 dark:text-blue-400">
                 <li>
-                  Thinking budget: <strong>agy</strong>, <strong>gemini</strong> (token-based)
+                  {t('settingsThinking.supportLine1Prefix')} <strong>agy</strong>,{' '}
+                  <strong>gemini</strong> {t('settingsThinking.supportLine1Suffix')}
                 </li>
                 <li>
-                  Reasoning effort: <strong>codex</strong> (suffix or <code>--effort</code>:
-                  medium/high/xhigh)
+                  {t('settingsThinking.supportLine2Prefix')} <strong>codex</strong>{' '}
+                  {t('settingsThinking.supportLine2SuffixPrefix')}
+                  <code>--effort</code>
+                  {t('settingsThinking.supportLine2SuffixPostfix')}
                 </li>
                 <li>
-                  Codex suffixes pin effort (for example <code>-high</code>); unsuffixed models use
-                  Thinking mode.
+                  {t('settingsThinking.supportLine3Prefix')} <code>-high</code>
+                  {t('settingsThinking.supportLine3Suffix')}
                 </li>
               </ul>
             </div>
@@ -202,7 +205,7 @@ export default function ThinkingSection() {
 
           {/* Mode Selection */}
           <div className="space-y-3">
-            <h3 className="text-base font-medium">Thinking Mode</h3>
+            <h3 className="text-base font-medium">{t('settingsThinking.modeTitle')}</h3>
             <div className="space-y-2">
               {(['auto', 'off', 'manual'] as ThinkingMode[]).map((mode) => (
                 <div
@@ -221,10 +224,9 @@ export default function ThinkingSection() {
                   <div>
                     <p className="font-medium capitalize">{mode}</p>
                     <p className="text-sm text-muted-foreground">
-                      {mode === 'auto' && 'Automatically set thinking based on model tier'}
-                      {mode === 'off' && 'Disable extended thinking'}
-                      {mode === 'manual' &&
-                        'Set a persistent override level or use CLI flags per run'}
+                      {mode === 'auto' && t('settingsThinking.modeAutoDesc')}
+                      {mode === 'off' && t('settingsThinking.modeOffDesc')}
+                      {mode === 'manual' && t('settingsThinking.modeManualDesc')}
                     </p>
                   </div>
                   <div
@@ -242,9 +244,9 @@ export default function ThinkingSection() {
           {/* Tier Defaults (only shown when mode is auto) */}
           {config.mode === 'auto' && (
             <div className="space-y-3">
-              <h3 className="text-base font-medium">Tier Defaults</h3>
+              <h3 className="text-base font-medium">{t('settingsThinking.tierDefaults')}</h3>
               <p className="text-sm text-muted-foreground">
-                Default thinking level for each model tier when in auto mode.
+                {t('settingsThinking.tierDefaultsDesc')}
               </p>
 
               <div className="space-y-3">
@@ -276,9 +278,9 @@ export default function ThinkingSection() {
           {/* Manual Override (shown when mode is manual) */}
           {config.mode === 'manual' && (
             <div className="space-y-3">
-              <h3 className="text-base font-medium">Persistent Override</h3>
+              <h3 className="text-base font-medium">{t('settingsThinking.persistentOverride')}</h3>
               <p className="text-sm text-muted-foreground">
-                Applied to all sessions. CLI flags still take priority.
+                {t('settingsThinking.persistentOverrideDesc')}
               </p>
               <Select
                 value={overrideSelectValue}
@@ -320,7 +322,7 @@ export default function ThinkingSection() {
                       onChange={(event) => setCustomOverrideBudgetInput(event.target.value)}
                       onBlur={handleApplyCustomBudget}
                       disabled={saving}
-                      placeholder="Enter custom budget"
+                      placeholder={t('settingsThinking.enterCustomBudget')}
                     />
                     <Button
                       type="button"
@@ -329,7 +331,7 @@ export default function ThinkingSection() {
                       onClick={handleApplyCustomBudget}
                       disabled={saving}
                     >
-                      Apply
+                      {t('settingsThinking.apply')}
                     </Button>
                   </div>
                   <p className="text-xs text-muted-foreground">
@@ -353,19 +355,21 @@ export default function ThinkingSection() {
               <ChevronDown
                 className={`w-4 h-4 transition-transform ${providerOverridesOpen ? 'rotate-0' : '-rotate-90'}`}
               />
-              Provider Overrides ({Object.keys(config.provider_overrides ?? {}).length})
+              {t('settingsThinking.providerOverrides', {
+                count: Object.keys(config.provider_overrides ?? {}).length,
+              })}
             </button>
             {providerOverridesOpen && (
               <div className="space-y-3">
                 <p className="text-sm text-muted-foreground">
-                  Override tier defaults for specific providers. Add custom provider keys as needed.
+                  {t('settingsThinking.providerOverridesDesc')}
                 </p>
                 <div className="flex items-center gap-2">
                   <Input
                     value={customProviderInput}
                     onChange={(event) => setCustomProviderInput(event.target.value)}
                     disabled={saving}
-                    placeholder="Add provider key (e.g. qwen)"
+                    placeholder={t('settingsThinking.addProviderPlaceholder')}
                   />
                   <Button
                     type="button"
@@ -374,7 +378,7 @@ export default function ThinkingSection() {
                     onClick={handleAddProvider}
                     disabled={saving}
                   >
-                    Add
+                    {t('settingsGlobalEnv.add')}
                   </Button>
                 </div>
                 {providerKeys.map((provider) => (
@@ -404,7 +408,9 @@ export default function ThinkingSection() {
                                 <SelectValue />
                               </SelectTrigger>
                               <SelectContent>
-                                <SelectItem value="__default__">Default</SelectItem>
+                                <SelectItem value="__default__">
+                                  {t('cursorPage.default')}
+                                </SelectItem>
                                 {THINKING_LEVELS.map((level) => (
                                   <SelectItem key={level.value} value={level.value}>
                                     {level.label}
@@ -425,9 +431,9 @@ export default function ThinkingSection() {
           {/* Show Warnings Toggle */}
           <div className="flex items-center justify-between p-4 rounded-lg bg-muted/50">
             <div>
-              <p className="font-medium">Show Warnings</p>
+              <p className="font-medium">{t('settingsThinking.showWarnings')}</p>
               <p className="text-sm text-muted-foreground">
-                Display warnings when thinking values are clamped or adjusted
+                {t('settingsThinking.showWarningsDesc')}
               </p>
             </div>
             <Switch
@@ -439,7 +445,7 @@ export default function ThinkingSection() {
 
           {/* Info Box */}
           <div className="p-4 rounded-lg border bg-muted/30">
-            <h4 className="text-sm font-medium mb-2">CLI &amp; Env Override</h4>
+            <h4 className="text-sm font-medium mb-2">{t('settingsThinking.cliEnvOverride')}</h4>
             <p className="text-sm text-muted-foreground mb-2">
               Override per session with flags or{' '}
               <code className="px-1.5 py-0.5 rounded bg-muted">CCS_THINKING</code> env var.
@@ -465,7 +471,7 @@ export default function ThinkingSection() {
           className="w-full"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
       </div>
     </>

ui/src/pages/settings/sections/websearch/index.tsx

@@ -10,8 +10,10 @@ import { ScrollArea } from '@/components/ui/scroll-area';
 import { RefreshCw, CheckCircle2, AlertCircle, Package } from 'lucide-react';
 import { useWebSearchConfig, useRawConfig } from '../../hooks';
 import { ProviderCard } from './provider-card';
+import { useTranslation } from 'react-i18next';
 
 export default function WebSearchSection() {
+  const { t } = useTranslation();
   const {
     config,
     status,
@@ -83,7 +85,7 @@ export default function WebSearchSection() {
       <div className="flex-1 flex items-center justify-center">
         <div className="flex items-center gap-3 text-muted-foreground">
           <RefreshCw className="w-5 h-5 animate-spin" />
-          <span>Loading...</span>
+          <span>{t('settings.loading')}</span>
         </div>
       </div>
     );
@@ -108,7 +110,7 @@ export default function WebSearchSection() {
         {success && (
           <div className="flex items-center gap-2 px-3 py-2 rounded-md border border-green-200 bg-green-50 text-green-700 shadow-lg dark:border-green-900/50 dark:bg-green-900/90 dark:text-green-300">
             <CheckCircle2 className="h-4 w-4 shrink-0" />
-            <span className="text-sm font-medium">Saved</span>
+            <span className="text-sm font-medium">{t('settings.saved')}</span>
           </div>
         )}
       </div>
@@ -116,18 +118,16 @@ export default function WebSearchSection() {
       {/* Scrollable Content */}
       <ScrollArea className="flex-1">
         <div className="p-5 space-y-6">
-          <p className="text-sm text-muted-foreground">
-            CLI-based web search for third-party profiles (gemini, codex, agy, etc.)
-          </p>
+          <p className="text-sm text-muted-foreground">{t('settingsWebsearch.description')}</p>
 
           {/* Status Summary */}
           <div className="flex items-center justify-between p-4 rounded-lg bg-muted/50">
             <div>
               <p className="font-medium">
-                {isGeminiEnabled ? 'WebSearch enabled' : 'WebSearch disabled'}
+                {isGeminiEnabled ? t('settingsWebsearch.enabled') : t('settingsWebsearch.disabled')}
               </p>
               {statusLoading ? (
-                <p className="text-sm text-muted-foreground">Checking status...</p>
+                <p className="text-sm text-muted-foreground">{t('settingsWebsearch.checking')}</p>
               ) : status?.readiness ? (
                 <p className="text-sm text-muted-foreground">{status.readiness.message}</p>
               ) : null}
@@ -139,19 +139,21 @@ export default function WebSearchSection() {
 
           {/* CLI Providers */}
           <div className="space-y-3">
-            <h3 className="text-base font-medium">Providers</h3>
+            <h3 className="text-base font-medium">{t('settingsWebsearch.providers')}</h3>
 
             {/* Empty state when no providers available */}
             {!status?.geminiCli && !status?.opencodeCli && !status?.grokCli && !statusLoading && (
               <div className="flex flex-col items-center justify-center p-8 border-2 border-dashed rounded-lg text-center bg-muted/30">
                 <Package className="w-12 h-12 text-muted-foreground mb-3 opacity-30" />
-                <p className="font-medium text-foreground mb-1">No providers configured</p>
+                <p className="font-medium text-foreground mb-1">
+                  {t('settingsWebsearch.noneConfigured')}
+                </p>
                 <p className="text-sm text-muted-foreground mb-4">
-                  Install CLI tools to enable web search providers
+                  {t('settingsWebsearch.noneConfiguredHint')}
                 </p>
                 <Button variant="outline" size="sm" onClick={fetchStatus}>
                   <RefreshCw className="w-4 h-4 mr-2" />
-                  Check for providers
+                  {t('settingsWebsearch.checkProviders')}
                 </Button>
               </div>
             )}
@@ -233,7 +235,7 @@ export default function WebSearchSection() {
           className="w-full"
         >
           <RefreshCw className={`w-4 h-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
-          Refresh
+          {t('settings.refresh')}
         </Button>
       </div>
     </>

ui/src/pages/settings/sections/websearch/provider-card.tsx

@@ -6,6 +6,7 @@
 import { Switch } from '@/components/ui/switch';
 import { Input } from '@/components/ui/input';
 import { Terminal, ExternalLink, ChevronDown, ChevronUp, Check } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 export interface ProviderCardProps {
   name: string;
@@ -50,6 +51,7 @@ export function ProviderCard({
   docsUrl,
   hintColor,
 }: ProviderCardProps) {
+  const { t } = useTranslation();
   const badgeClass =
     badgeColor === 'green'
       ? 'bg-green-500/10 text-green-600'
@@ -98,11 +100,11 @@ export function ProviderCard({
               </span>
               {installed ? (
                 <span className="text-xs px-1.5 py-0.5 rounded bg-green-500/10 text-green-600 font-medium">
-                  installed
+                  {t('settingsWebsearch.installed')}
                 </span>
               ) : (
                 <span className="text-xs px-1.5 py-0.5 rounded bg-amber-500/10 text-amber-600 font-medium">
-                  not installed
+                  {t('settingsWebsearch.notInstalled')}
                 </span>
               )}
             </div>
@@ -116,7 +118,9 @@ export function ProviderCard({
       {enabled && modelInput !== undefined && setModelInput && onModelBlur && (
         <div className="px-4 pb-4 pt-0">
           <div className="flex items-center gap-2">
-            <label className="text-sm text-muted-foreground whitespace-nowrap">Model:</label>
+            <label className="text-sm text-muted-foreground whitespace-nowrap">
+              {t('settingsWebsearch.model')}
+            </label>
             <Input
               value={modelInput}
               onChange={(e) => setModelInput(e.target.value)}
@@ -128,7 +132,7 @@ export function ProviderCard({
             {modelSaved && (
               <span className="flex items-center gap-1 text-green-600 dark:text-green-400 text-xs animate-in fade-in duration-200">
                 <Check className="w-3.5 h-3.5" />
-                Saved
+                {t('settings.saved')}
               </span>
             )}
           </div>
@@ -143,13 +147,16 @@ export function ProviderCard({
             className={`flex items-center gap-2 text-sm hover:underline w-full py-2 ${hintTextClass}`}
           >
             {showHint ? <ChevronUp className="w-4 h-4" /> : <ChevronDown className="w-4 h-4" />}
-            How to install {displayName} CLI
+            {t('settingsWebsearch.howInstall', { name: displayName })}
           </button>
           {showHint && (
             <div className={`mt-2 p-3 rounded-md text-sm ${hintBgClass}`}>
               <p className="mb-2">
-                Install globally{' '}
-                {badge === 'GROK_API_KEY' ? '(requires xAI API key)' : '(FREE tier available)'}:
+                {t('settingsWebsearch.installGlobally')}{' '}
+                {badge === 'GROK_API_KEY'
+                  ? t('settingsWebsearch.requiresKey')
+                  : t('settingsWebsearch.freeTier')}
+                :
               </p>
               <code className={`text-sm px-2 py-1 rounded font-mono block mb-2 ${hintCodeClass}`}>
                 {installCmd}
@@ -161,7 +168,7 @@ export function ProviderCard({
                 className="hover:underline inline-flex items-center gap-1"
               >
                 <ExternalLink className="w-3 h-3" />
-                View documentation
+                {t('settingsWebsearch.viewDocs')}
               </a>
             </div>
           )}

ui/src/pages/shared.tsx

@@ -8,6 +8,8 @@ import { ScrollArea } from '@/components/ui/scroll-area';
 import { Tabs, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { useSharedItemContent, useSharedItems, useSharedSummary } from '@/hooks/use-shared';
 import { cn } from '@/lib/utils';
+import '@/lib/i18n';
+import { useTranslation } from 'react-i18next';
 import {
   AlertCircle,
   AlertTriangle,
@@ -21,14 +23,15 @@ import {
 
 type TabType = 'commands' | 'skills' | 'agents';
 
-const tabLabels: Record<TabType, string> = {
-  commands: 'Commands',
-  skills: 'Skills',
-  agents: 'Agents',
-};
-
 export function SharedPage() {
+  const { t } = useTranslation();
   const [tab, setTab] = useState<TabType>('commands');
+  const tabLabels: Record<TabType, string> = {
+    commands: t('sharedPage.commands'),
+    skills: t('sharedPage.skills'),
+    agents: t('sharedPage.agents'),
+  };
+
   const [query, setQuery] = useState('');
   const [selectedItemPath, setSelectedItemPath] = useState<string | null>(null);
 
@@ -105,10 +108,8 @@ export function SharedPage() {
         <div className="flex flex-col gap-3 lg:flex-row lg:items-end lg:justify-between">
           <div className="space-y-3">
             <div>
-              <h1 className="text-2xl font-bold">Shared Data</h1>
-              <p className="text-muted-foreground">
-                Commands, skills, and agents shared across Claude instances
-              </p>
+              <h1 className="text-2xl font-bold">{t('sharedPage.title')}</h1>
+              <p className="text-muted-foreground">{t('sharedPage.subtitle')}</p>
             </div>
 
             <Tabs
@@ -133,14 +134,18 @@ export function SharedPage() {
 
           <div className="flex flex-col gap-2 lg:items-end">
             <div className="grid w-full gap-2 sm:w-auto sm:min-w-[340px] sm:grid-cols-3">
-              <HeaderMetricCard label="Total Shared" value={totalSharedItems} />
+              <HeaderMetricCard label={t('sharedPage.totalShared')} value={totalSharedItems} />
               <HeaderMetricCard label={tabLabels[tab]} value={allItems.length} />
-              <HeaderMetricCard label="Visible" value={filteredItems.length} />
+              <HeaderMetricCard label={t('sharedPage.visible')} value={filteredItems.length} />
             </div>
 
             <div className="flex items-center gap-2 text-xs">
-              <Badge variant="secondary">Markdown detail view</Badge>
-              {activeQuery ? <Badge variant="outline">Filter: {activeQuery}</Badge> : null}
+              <Badge variant="secondary">{t('sharedPage.markdownDetail')}</Badge>
+              {activeQuery ? (
+                <Badge variant="outline">
+                  {t('sharedPage.filterPrefix')} {activeQuery}
+                </Badge>
+              ) : null}
             </div>
           </div>
         </div>
@@ -148,7 +153,7 @@ export function SharedPage() {
         {summary && !summary.symlinkStatus.valid && (
           <Alert variant="warning">
             <AlertTriangle className="h-4 w-4" />
-            <AlertTitle>Configuration Required</AlertTitle>
+            <AlertTitle>{t('sharedPage.configurationRequired')}</AlertTitle>
             <AlertDescription>
               {summary.symlinkStatus.message}. Run `ccs sync` to configure.
             </AlertDescription>
@@ -158,7 +163,7 @@ export function SharedPage() {
         {isSummaryError && (
           <Alert variant="info">
             <AlertTriangle className="h-4 w-4" />
-            <AlertTitle>Counts unavailable</AlertTitle>
+            <AlertTitle>{t('sharedPage.countsUnavailable')}</AlertTitle>
             <AlertDescription>
               <p>{summaryErrorMessage}</p>
               <div className="mt-3">
@@ -170,7 +175,7 @@ export function SharedPage() {
                   }}
                 >
                   <RefreshCw className="w-4 h-4 mr-2" />
-                  Retry counts
+                  {t('sharedPage.retryCounts')}
                 </Button>
               </div>
             </AlertDescription>
@@ -200,30 +205,38 @@ export function SharedPage() {
                   <Input
                     value={query}
                     onChange={(event) => setQuery(event.target.value)}
-                    placeholder={`Filter ${tab} by name, description, or path`}
-                    aria-label={`Filter ${tab} by name, description, or path`}
+                    placeholder={t('sharedPage.filterPlaceholder', { tab })}
+                    aria-label={t('sharedPage.filterPlaceholder', { tab })}
                     className="pl-8 h-9"
                   />
                 </div>
 
                 {!isLoading && !isError && (
                   <p className="text-xs text-muted-foreground">
-                    Showing {filteredItems.length} of {allItems.length} {tab}
-                    {activeQuery ? ` for "${activeQuery}"` : ''}
-                    {isFetching ? ' (refreshing...)' : ''}
+                    {t('sharedPage.showing', {
+                      visible: filteredItems.length,
+                      total: allItems.length,
+                      tab,
+                    })}
+                    {activeQuery ? t('sharedPage.showingQuery', { query: activeQuery }) : ''}
+                    {isFetching ? t('sharedPage.refreshing') : ''}
                   </p>
                 )}
               </div>
 
               <ScrollArea className="flex-1 min-h-0">
                 {isLoading ? (
-                  <div className="p-4 text-sm text-muted-foreground">Loading shared {tab}...</div>
+                  <div className="p-4 text-sm text-muted-foreground">
+                    {t('sharedPage.loadingShared', { tab })}
+                  </div>
                 ) : isError ? (
                   <div className="p-4 text-center">
                     <div className="space-y-3 py-8">
                       <AlertCircle className="w-10 h-10 mx-auto text-destructive/50" />
                       <div>
-                        <p className="text-sm font-medium">Failed to load shared {tab}</p>
+                        <p className="text-sm font-medium">
+                          {t('sharedPage.failedLoadShared', { tab })}
+                        </p>
                         <p className="text-xs text-muted-foreground mt-1">{itemsErrorMessage}</p>
                       </div>
                       <Button
@@ -234,17 +247,17 @@ export function SharedPage() {
                         }}
                       >
                         <RefreshCw className="w-4 h-4 mr-2" />
-                        Retry
+                        {t('sharedPage.retry')}
                       </Button>
                     </div>
                   </div>
                 ) : hasNoItems ? (
                   <div className="p-4 text-sm text-muted-foreground">
-                    No shared {tab} found. Run `ccs sync` or add items in your shared directory.
+                    {t('sharedPage.noSharedFound', { tab })}
                   </div>
                 ) : hasNoMatches ? (
                   <div className="p-4 text-sm text-muted-foreground">
-                    No {tab} match "{activeQuery}".
+                    {t('sharedPage.noMatch', { tab, query: activeQuery })}
                   </div>
                 ) : (
                   <div className="p-2 space-y-1">
@@ -277,7 +290,7 @@ export function SharedPage() {
             <div className="min-w-0 min-h-0 flex flex-col bg-muted/20">
               {!selectedItem ? (
                 <div className="min-h-[320px] flex items-center justify-center p-6 text-center text-muted-foreground">
-                  Select a {tab.slice(0, -1)} to view full content.
+                  {t('sharedPage.selectOne', { tab: tab.slice(0, -1) })}
                 </div>
               ) : (
                 <>
@@ -293,11 +306,15 @@ export function SharedPage() {
                   <div className="p-4 space-y-4 min-h-0 flex-1 flex flex-col">
                     <div className="rounded-md border bg-muted/35 p-3">
                       <div className="grid gap-3 sm:grid-cols-2 xl:grid-cols-3">
-                        <MetadataField label="Path" value={selectedItem.path} mono />
+                        <MetadataField
+                          label={t('sharedPage.pathLabel')}
+                          value={selectedItem.path}
+                          mono
+                        />
                         {selectedItemContent?.contentPath &&
                           selectedItemContent.contentPath !== selectedItem.path && (
                             <MetadataField
-                              label="Resolved Source"
+                              label={t('sharedPage.resolvedSource')}
                               value={selectedItemContent.contentPath}
                               mono
                             />
@@ -310,12 +327,12 @@ export function SharedPage() {
                         <ScrollArea className="h-full px-5 py-4">
                           {isContentLoading ? (
                             <p className="text-sm text-muted-foreground">
-                              Loading markdown content...
+                              {t('sharedPage.loadingMarkdown')}
                             </p>
                           ) : isContentError ? (
                             <Alert variant="destructive" className="max-w-2xl">
                               <AlertTriangle className="h-4 w-4" />
-                              <AlertTitle>Failed to load content</AlertTitle>
+                              <AlertTitle>{t('sharedPage.failedLoadContent')}</AlertTitle>
                               <AlertDescription>
                                 <p>{contentErrorMessage}</p>
                                 <div className="mt-3">
@@ -327,7 +344,7 @@ export function SharedPage() {
                                     }}
                                   >
                                     <RefreshCw className="w-4 h-4 mr-2" />
-                                    Retry content
+                                    {t('sharedPage.retryContent')}
                                   </Button>
                                 </div>
                               </AlertDescription>
@@ -433,10 +450,11 @@ interface ParsedMarkdownDocument {
 }
 
 function MarkdownViewer({ content }: { content: string }) {
+  const { t } = useTranslation();
   const parsedDocument = useMemo(() => parseMarkdownDocument(content), [content]);
 
   if (parsedDocument.blocks.length === 0 && parsedDocument.frontmatter.length === 0) {
-    return <p className="text-sm text-muted-foreground">No markdown content available.</p>;
+    return <p className="text-sm text-muted-foreground">{t('sharedPage.noMarkdown')}</p>;
   }
 
   return (

ui/src/pages/updates.tsx

@@ -17,15 +17,10 @@ import {
   writeNoticeProgressMap,
   type NoticeProgressMap,
 } from '@/lib/updates-notice-state';
+import { useTranslation } from 'react-i18next';
 
 type NoticeViewMode = 'inbox' | 'done' | 'all';
 
-const NOTICE_VIEW_MODES: { id: NoticeViewMode; label: string }[] = [
-  { id: 'inbox', label: 'Action Required' },
-  { id: 'done', label: 'Done' },
-  { id: 'all', label: 'All' },
-];
-
 function noticeMatchesQuery(notice: SupportNotice, queryValue: string): boolean {
   if (!queryValue) {
     return true;
@@ -49,6 +44,7 @@ function noticeMatchesQuery(notice: SupportNotice, queryValue: string): boolean
 }
 
 export function UpdatesPage() {
+  const { t } = useTranslation();
   const notices = useMemo(
     () => [...SUPPORT_NOTICES].sort((a, b) => b.publishedAt.localeCompare(a.publishedAt)),
     []
@@ -112,20 +108,18 @@ export function UpdatesPage() {
           <div className="space-y-1">
             <div className="flex items-center gap-2">
               <Megaphone className="h-5 w-5 text-primary" />
-              <h1 className="font-semibold">Updates Inbox</h1>
+              <h1 className="font-semibold">{t('updates.inboxTitle')}</h1>
             </div>
-            <p className="text-xs text-muted-foreground">
-              Focus on actions, then mark updates done or dismissed.
-            </p>
+            <p className="text-xs text-muted-foreground">{t('updates.inboxSubtitle')}</p>
           </div>
 
           <div className="grid grid-cols-2 gap-2 text-xs">
             <div className="rounded-md border bg-background px-2 py-1.5">
-              <p className="text-muted-foreground">Needs Action</p>
+              <p className="text-muted-foreground">{t('updates.needsAction')}</p>
               <p className="text-base font-semibold">{pendingCount}</p>
             </div>
             <div className="rounded-md border bg-background px-2 py-1.5">
-              <p className="text-muted-foreground">Done</p>
+              <p className="text-muted-foreground">{t('updates.doneCount')}</p>
               <p className="text-base font-semibold">{doneCount}</p>
             </div>
           </div>
@@ -135,13 +129,17 @@ export function UpdatesPage() {
             <Input
               value={query}
               onChange={(event) => setQuery(event.target.value)}
-              placeholder="Search actions or commands"
+              placeholder={t('updates.searchPlaceholder')}
               className="h-9 pl-8"
             />
           </div>
 
           <div className="flex flex-wrap gap-1.5">
-            {NOTICE_VIEW_MODES.map((mode) => (
+            {[
+              { id: 'inbox' as const, label: t('updates.actionRequired') },
+              { id: 'done' as const, label: t('updates.done') },
+              { id: 'all' as const, label: t('updates.all') },
+            ].map((mode) => (
               <Button
                 key={mode.id}
                 size="sm"
@@ -158,7 +156,7 @@ export function UpdatesPage() {
           <div className="space-y-2 p-2">
             {visibleNotices.length === 0 ? (
               <div className="rounded-md border border-dashed p-3 text-xs text-muted-foreground">
-                No notices match this view.
+                {t('updates.noNotices')}
               </div>
             ) : (
               visibleNotices.map((notice) => (

ui/tests/unit/ui/i18n/language-switcher.test.tsx

@@ -0,0 +1,87 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { render, screen, userEvent, waitFor } from '@tests/setup/test-utils';
+import i18n from '@/lib/i18n';
+import { LanguageSwitcher } from '@/components/layout/language-switcher';
+import { TabNavigation } from '@/pages/settings/components/tab-navigation';
+import { getInitialLocale, LOCALE_STORAGE_KEY, persistLocale } from '@/lib/locales';
+
+describe('Dashboard i18n', () => {
+  const storage = new Map<string, string>();
+  const localStorageMock = window.localStorage as unknown as {
+    getItem: ReturnType<typeof vi.fn>;
+    setItem: ReturnType<typeof vi.fn>;
+    removeItem: ReturnType<typeof vi.fn>;
+    clear: ReturnType<typeof vi.fn>;
+  };
+
+  beforeEach(async () => {
+    storage.clear();
+    localStorageMock.getItem.mockImplementation((key: string) => storage.get(key) ?? null);
+    localStorageMock.setItem.mockImplementation((key: string, value: string) => {
+      storage.set(key, value);
+    });
+    localStorageMock.removeItem.mockImplementation((key: string) => {
+      storage.delete(key);
+    });
+    localStorageMock.clear.mockImplementation(() => {
+      storage.clear();
+    });
+    Object.defineProperty(HTMLElement.prototype, 'hasPointerCapture', {
+      configurable: true,
+      value: vi.fn(() => false),
+    });
+    Object.defineProperty(HTMLElement.prototype, 'setPointerCapture', {
+      configurable: true,
+      value: vi.fn(),
+    });
+    Object.defineProperty(HTMLElement.prototype, 'releasePointerCapture', {
+      configurable: true,
+      value: vi.fn(),
+    });
+    Object.defineProperty(Element.prototype, 'scrollIntoView', {
+      configurable: true,
+      value: vi.fn(),
+    });
+    class ResizeObserverMock {
+      observe() {}
+      unobserve() {}
+      disconnect() {}
+    }
+    global.ResizeObserver = ResizeObserverMock as unknown as typeof ResizeObserver;
+    await i18n.changeLanguage('en');
+  });
+
+  it(
+    'renders language switcher and changes locale',
+    async () => {
+      render(<LanguageSwitcher />);
+
+    expect(screen.getByRole('combobox')).toBeInTheDocument();
+    expect(screen.getByText('English')).toBeInTheDocument();
+
+    await userEvent.click(screen.getByRole('combobox'));
+    await userEvent.click(await screen.findByText('Simplified Chinese'));
+
+    await waitFor(() => {
+      expect(i18n.language).toBe('zh-CN');
+    });
+    expect(localStorageMock.setItem).toHaveBeenCalledWith(LOCALE_STORAGE_KEY, 'zh-CN');
+    },
+    10000
+  );
+
+  it('restores locale from persisted storage', () => {
+    persistLocale('zh-CN');
+    expect(getInitialLocale()).toBe('zh-CN');
+  });
+
+  it('shows Chinese labels on translated settings tabs', async () => {
+    await i18n.changeLanguage('zh-CN');
+
+    render(<TabNavigation activeTab="websearch" onTabChange={() => {}} />);
+
+    expect(screen.getByText('网页')).toBeInTheDocument();
+    expect(screen.getByText('环境')).toBeInTheDocument();
+    expect(screen.getByText('认证')).toBeInTheDocument();
+  });
+});