diff --git a/src/i18n/locales/de.toml b/src/i18n/locales/de.toml
deleted file mode 100644
index 36079a8..0000000
--- a/src/i18n/locales/de.toml
+++ /dev/null
@@ -1,49 +0,0 @@
-code = "de"
-native_name = "Deutsch"
-
-window_title = "Claude Code Usage Bubble"
-refresh = "Aktualisieren"
-update_frequency = "Aktualisierungsintervall"
-one_minute = "1 Minute"
-five_minutes = "5 Minuten"
-fifteen_minutes = "15 Minuten"
-one_hour = "1 Stunde"
-models = "Modelle"
-claude_label = "Claude Code"
-chatgpt_label = "Codex"
-settings = "Einstellungen"
-start_with_windows = "Mit Windows starten"
-reset_position = "Position zurücksetzen"
-language = "Sprache"
-system_default = "Systemstandard"
-check_for_updates = "Nach Updates suchen"
-checking_for_updates = "Suche läuft…"
-up_to_date = "Aktuell"
-update_failed = "Update fehlgeschlagen"
-applying_update = "Update wird angewendet…"
-update_available = "Update verfügbar"
-update_via_winget = "über WinGet"
-auto_update_check = "Automatische Updateprüfung"
-auto_check_disabled = "Deaktiviert"
-auto_check_hourly = "Stündlich"
-auto_check_daily = "Täglich"
-auto_check_weekly = "Wöchentlich"
-exit = "Beenden"
-restart = "Neu starten"
-show_widget = "Widget anzeigen"
-session_window = "5h"
-weekly_window = "7d"
-now = "jetzt"
-day_suffix = "T"
-hour_suffix = "h"
-minute_suffix = "m"
-second_suffix = "s"
-token_expired_title = "Claude Code-Sitzung abgelaufen"
-token_expired_body = "Melde dich erneut an, um die Nutzung weiter zu verfolgen."
-chatgpt_token_expired_title = "Codex-Sitzung abgelaufen"
-chatgpt_token_expired_body = "Melde dich erneut an, um die Nutzung weiter zu verfolgen."
-threshold_80_body = "5-Stunden-Limit naht."
-threshold_95_body = "Limit fast erreicht — gönn dir eine Pause."
-update_applied_title = "Update angewendet"
-update_applied_body = "Aktualisiert auf v"
-update_rollback_failed_body = "Update fehlgeschlagen. Deine ursprüngliche Binärdatei liegt unter: "
diff --git a/src/i18n/locales/es.toml b/src/i18n/locales/es.toml
deleted file mode 100644
index 2504efe..0000000
--- a/src/i18n/locales/es.toml
+++ /dev/null
@@ -1,49 +0,0 @@
-code = "es"
-native_name = "Español"
-
-window_title = "Claude Code Usage Bubble"
-refresh = "Actualizar"
-update_frequency = "Frecuencia de actualización"
-one_minute = "1 minuto"
-five_minutes = "5 minutos"
-fifteen_minutes = "15 minutos"
-one_hour = "1 hora"
-models = "Modelos"
-claude_label = "Claude Code"
-chatgpt_label = "Codex"
-settings = "Ajustes"
-start_with_windows = "Iniciar con Windows"
-reset_position = "Restablecer posición"
-language = "Idioma"
-system_default = "Predeterminado del sistema"
-check_for_updates = "Buscar actualizaciones"
-checking_for_updates = "Buscando actualizaciones…"
-up_to_date = "Al día"
-update_failed = "Actualización fallida"
-applying_update = "Aplicando actualización…"
-update_available = "Actualización disponible"
-update_via_winget = "vía WinGet"
-auto_update_check = "Búsqueda automática de actualizaciones"
-auto_check_disabled = "Desactivada"
-auto_check_hourly = "Cada hora"
-auto_check_daily = "Cada día"
-auto_check_weekly = "Cada semana"
-exit = "Salir"
-restart = "Reiniciar"
-show_widget = "Mostrar widget"
-session_window = "5h"
-weekly_window = "7d"
-now = "ahora"
-day_suffix = "d"
-hour_suffix = "h"
-minute_suffix = "m"
-second_suffix = "s"
-token_expired_title = "Sesión de Claude Code caducada"
-token_expired_body = "Vuelve a iniciar sesión para seguir registrando el uso."
-chatgpt_token_expired_title = "Sesión de Codex caducada"
-chatgpt_token_expired_body = "Vuelve a iniciar sesión para seguir registrando el uso."
-threshold_80_body = "Cerca del límite de 5 horas."
-threshold_95_body = "Límite casi alcanzado — reduce el ritmo."
-update_applied_title = "Actualización aplicada"
-update_applied_body = "Actualizado a v"
-update_rollback_failed_body = "Actualización fallida. Tu binario original está guardado en: "
diff --git a/src/i18n/locales/fr.toml b/src/i18n/locales/fr.toml
deleted file mode 100644
index 0d89714..0000000
--- a/src/i18n/locales/fr.toml
+++ /dev/null
@@ -1,49 +0,0 @@
-code = "fr"
-native_name = "Français"
-
-window_title = "Claude Code Usage Bubble"
-refresh = "Actualiser"
-update_frequency = "Fréquence de mise à jour"
-one_minute = "1 minute"
-five_minutes = "5 minutes"
-fifteen_minutes = "15 minutes"
-one_hour = "1 heure"
-models = "Modèles"
-claude_label = "Claude Code"
-chatgpt_label = "Codex"
-settings = "Paramètres"
-start_with_windows = "Lancer avec Windows"
-reset_position = "Réinitialiser la position"
-language = "Langue"
-system_default = "Paramètre système"
-check_for_updates = "Rechercher des mises à jour"
-checking_for_updates = "Recherche en cours…"
-up_to_date = "À jour"
-update_failed = "Mise à jour échouée"
-applying_update = "Mise à jour en cours…"
-update_available = "Mise à jour disponible"
-update_via_winget = "via WinGet"
-auto_update_check = "Vérification automatique des mises à jour"
-auto_check_disabled = "Désactivée"
-auto_check_hourly = "Toutes les heures"
-auto_check_daily = "Quotidienne"
-auto_check_weekly = "Hebdomadaire"
-exit = "Quitter"
-restart = "Redémarrer"
-show_widget = "Afficher le widget"
-session_window = "5h"
-weekly_window = "7j"
-now = "maintenant"
-day_suffix = "j"
-hour_suffix = "h"
-minute_suffix = "m"
-second_suffix = "s"
-token_expired_title = "Session Claude Code expirée"
-token_expired_body = "Reconnectez-vous pour continuer à suivre votre utilisation."
-chatgpt_token_expired_title = "Session Codex expirée"
-chatgpt_token_expired_body = "Reconnectez-vous pour continuer à suivre votre utilisation."
-threshold_80_body = "Approche de la limite de 5 heures."
-threshold_95_body = "Limite proche — pensez à lever le pied."
-update_applied_title = "Mise à jour appliquée"
-update_applied_body = "Mis à jour vers v"
-update_rollback_failed_body = "Échec de la mise à jour. Votre binaire d'origine est enregistré à : "
diff --git a/src/i18n/locales/nl.toml b/src/i18n/locales/nl.toml
deleted file mode 100644
index 7541ad6..0000000
--- a/src/i18n/locales/nl.toml
+++ /dev/null
@@ -1,49 +0,0 @@
-code = "nl"
-native_name = "Nederlands"
-
-window_title = "Claude Code Usage Bubble"
-refresh = "Vernieuwen"
-update_frequency = "Bijwerkfrequentie"
-one_minute = "1 minuut"
-five_minutes = "5 minuten"
-fifteen_minutes = "15 minuten"
-one_hour = "1 uur"
-models = "Modellen"
-claude_label = "Claude Code"
-chatgpt_label = "Codex"
-settings = "Instellingen"
-start_with_windows = "Starten met Windows"
-reset_position = "Positie herstellen"
-language = "Taal"
-system_default = "Systeemstandaard"
-check_for_updates = "Controleren op updates"
-checking_for_updates = "Bezig met controleren…"
-up_to_date = "Up-to-date"
-update_failed = "Update mislukt"
-applying_update = "Update toepassen…"
-update_available = "Update beschikbaar"
-update_via_winget = "via WinGet"
-auto_update_check = "Automatische updatecontrole"
-auto_check_disabled = "Uitgeschakeld"
-auto_check_hourly = "Per uur"
-auto_check_daily = "Dagelijks"
-auto_check_weekly = "Wekelijks"
-exit = "Afsluiten"
-restart = "Opnieuw starten"
-show_widget = "Widget tonen"
-session_window = "5u"
-weekly_window = "7d"
-now = "nu"
-day_suffix = "d"
-hour_suffix = "u"
-minute_suffix = "m"
-second_suffix = "s"
-token_expired_title = "Claude Code-sessie verlopen"
-token_expired_body = "Meld je opnieuw aan om gebruik te blijven volgen."
-chatgpt_token_expired_title = "Codex-sessie verlopen"
-chatgpt_token_expired_body = "Meld je opnieuw aan om gebruik te blijven volgen."
-threshold_80_body = "Je nadert de 5-uurslimiet."
-threshold_95_body = "Limiet bijna bereikt — overweeg even gas terug te nemen."
-update_applied_title = "Update toegepast"
-update_applied_body = "Bijgewerkt naar v"
-update_rollback_failed_body = "Update mislukt. Je oorspronkelijke bestand staat op: "
diff --git a/src/i18n/locales/vi.toml b/src/i18n/locales/vi.toml
new file mode 100644
index 0000000..cf31803
--- /dev/null
+++ b/src/i18n/locales/vi.toml
@@ -0,0 +1,49 @@
+code = "vi"
+native_name = "Tiếng Việt"
+
+window_title = "Claude Code Usage Bubble"
+refresh = "Làm mới"
+update_frequency = "Tần suất cập nhật"
+one_minute = "1 phút"
+five_minutes = "5 phút"
+fifteen_minutes = "15 phút"
+one_hour = "1 giờ"
+models = "Mô hình"
+claude_label = "Claude Code"
+chatgpt_label = "Codex"
+settings = "Cài đặt"
+start_with_windows = "Khởi động cùng Windows"
+reset_position = "Đặt lại vị trí"
+language = "Ngôn ngữ"
+system_default = "Mặc định hệ thống"
+check_for_updates = "Kiểm tra cập nhật"
+checking_for_updates = "Đang kiểm tra cập nhật…"
+up_to_date = "Đã là phiên bản mới nhất"
+update_failed = "Cập nhật thất bại"
+applying_update = "Đang áp dụng cập nhật…"
+update_available = "Có bản cập nhật mới"
+update_via_winget = "qua WinGet"
+auto_update_check = "Tự động kiểm tra cập nhật"
+auto_check_disabled = "Tắt"
+auto_check_hourly = "Mỗi giờ"
+auto_check_daily = "Hằng ngày"
+auto_check_weekly = "Hằng tuần"
+exit = "Thoát"
+restart = "Khởi động lại"
+show_widget = "Hiện widget"
+session_window = "5g"
+weekly_window = "7n"
+now = "ngay"
+day_suffix = "n"
+hour_suffix = "g"
+minute_suffix = "p"
+second_suffix = "s"
+token_expired_title = "Phiên Claude Code đã hết hạn"
+token_expired_body = "Hãy đăng nhập lại để tiếp tục theo dõi mức sử dụng."
+chatgpt_token_expired_title = "Phiên Codex đã hết hạn"
+chatgpt_token_expired_body = "Hãy đăng nhập lại để tiếp tục theo dõi mức sử dụng."
+threshold_80_body = "Sắp chạm giới hạn 5 giờ."
+threshold_95_body = "Sắp tới giới hạn — hãy cân nhắc giảm tốc."
+update_applied_title = "Đã áp dụng cập nhật"
+update_applied_body = "Đã cập nhật lên v"
+update_rollback_failed_body = "Cập nhật thất bại. Tệp gốc của bạn được lưu tại: "
diff --git a/src/i18n/mod.rs b/src/i18n/mod.rs
index 2cc9c90..21e0525 100644
--- a/src/i18n/mod.rs
+++ b/src/i18n/mod.rs
@@ -87,12 +87,9 @@ struct LocaleFile {
 
 const RAW_LOCALES: &[(&str, &str)] = &[
     ("en", include_str!("locales/en.toml")),
-    ("nl", include_str!("locales/nl.toml")),
-    ("es", include_str!("locales/es.toml")),
-    ("fr", include_str!("locales/fr.toml")),
-    ("de", include_str!("locales/de.toml")),
     ("ja", include_str!("locales/ja.toml")),
     ("ko", include_str!("locales/ko.toml")),
+    ("vi", include_str!("locales/vi.toml")),
     ("zh-TW", include_str!("locales/zh-TW.toml")),
 ];