Add support for Traditional Chinese language (#3899)

Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: crazywoola <427733928@qq.com>

web/i18n/language.ts

@@ -18,6 +18,7 @@ export type I18nText = {
   'uk-UA': string
   'vi-VN': string
   'de_DE': string
+  'zh_Hant': string
 }
 
 export const languages = [
@@ -33,6 +34,12 @@ export const languages = [
     example: '你好，Dify！',
     supported: true,
   },
+  {
+    value: 'zh-Hant',
+    name: '繁體中文',
+    example: '你好，Dify！',
+    supported: true,
+  },
   {
     value: 'pt-BR',
     name: 'Português (Brasil)',