From bbd815ec679ae9cd73a321bacb95590e6f7c143b Mon Sep 17 00:00:00 2001
From: Ban921 <3637117+Ban921@users.noreply.github.com>
Date: Wed, 27 May 2026 09:46:24 +0800
Subject: [PATCH] feat: add Traditional Chinese (zh-Hant) language option

The zh-Hant translations are synced from Weblate (98% complete) but the
locale was never registered in the language selector, so users could not
select it. Register zh-Hant in supportedLanguageKeys, add its display
label, and map it to the zh-TW date-fns locale.
---
 web/public/locales/en/common.json           | 1 +
 web/src/components/menu/GeneralSettings.tsx | 1 +
 web/src/hooks/use-date-locale.ts            | 2 ++
 web/src/lib/const.ts                        | 1 +
 4 files changed, 5 insertions(+)

diff --git a/web/public/locales/en/common.json b/web/public/locales/en/common.json
index 4436808d08..272e0f2795 100644
--- a/web/public/locales/en/common.json
+++ b/web/public/locales/en/common.json
@@ -177,6 +177,7 @@
       "en": "English (English)",
       "es": "Español (Spanish)",
       "zhCN": "简体中文 (Simplified Chinese)",
+      "zhHant": "繁體中文 (Traditional Chinese)",
       "hi": "हिन्दी (Hindi)",
       "fr": "Français (French)",
       "ar": "العربية (Arabic)",
diff --git a/web/src/components/menu/GeneralSettings.tsx b/web/src/components/menu/GeneralSettings.tsx
index b3ab45f987..88d834d4dc 100644
--- a/web/src/components/menu/GeneralSettings.tsx
+++ b/web/src/components/menu/GeneralSettings.tsx
@@ -109,6 +109,7 @@ export default function GeneralSettings({ className }: GeneralSettingsProps) {
       "nb-NO": "nb",
       "yue-Hant": "yue",
       "zh-CN": "zhCN",
+      "zh-Hant": "zhHant",
       "pt-BR": "ptBR",
     };
 
diff --git a/web/src/hooks/use-date-locale.ts b/web/src/hooks/use-date-locale.ts
index 4feef686a4..9cd018c423 100644
--- a/web/src/hooks/use-date-locale.ts
+++ b/web/src/hooks/use-date-locale.ts
@@ -34,6 +34,8 @@ const localeMap: Record<string, () => Promise<Locale>> = {
   sk: () => import("date-fns/locale/sk").then((module) => module.sk),
   "yue-Hant": () =>
     import("date-fns/locale/zh-HK").then((module) => module.zhHK),
+  "zh-Hant": () =>
+    import("date-fns/locale/zh-TW").then((module) => module.zhTW),
   lt: () => import("date-fns/locale/lt").then((module) => module.lt),
   th: () => import("date-fns/locale/th").then((module) => module.th),
   ca: () => import("date-fns/locale/ca").then((module) => module.ca),
diff --git a/web/src/lib/const.ts b/web/src/lib/const.ts
index 5db13e375d..2802870201 100644
--- a/web/src/lib/const.ts
+++ b/web/src/lib/const.ts
@@ -29,6 +29,7 @@ export const supportedLanguageKeys = [
   "nb-NO",
   "sv",
   "zh-CN",
+  "zh-Hant",
   "yue-Hant",
   "ja",
   "vi",