🐛 [firebase_ui_localizations] Traditional Chinese is not loading

[outdoorapps]

Traditional Chinese will not be loaded in Firebase UI Auth using the standard locales as described here. (Simplified Chinese can be properly loaded).

This issue is caused by the non-standard key zh_tw In /lib/src/all_languages.dart (see below). It should have been zh_TW.

final localizations = <String, FirebaseUILocalizationLabels>{
  ...
  'zh': const ZhLocalizations(),
  'zh_tw': const ZhTWLocalizations(),
  ...
};

I suggest the following fix to match the standard given by Flutter in the previous URL.

In /lib/src/all_languages.dart:

final localizations = <String, FirebaseUILocalizationLabels>{
  ...
  'zh': const ZhLocalizations(), // Simplified Chinese
  'zh_Hans': const ZhLocalizations(), // Simplified Chinese
  'zh_Hant': const ZhTWLocalizations(), // Traditional Chinese
  'zh_Hans_CN': const ZhLocalizations(), // Simplified Chinese
  'zh_Hant_TW': const ZhTWLocalizations(), // Traditional Chinese
  'zh_Hant_HK': const ZhTWLocalizations(), // Traditional Chinese
  ...
};

In /lib/src/l10n.dart:

@override
  Future<FirebaseUILocalizations> load(Locale locale) {
    late FirebaseUILocalizationLabels labels;

    final key = locale.languageCode;
    // Change this line to include script code
    final scriptCode = locale.scriptCode;
    final countryCode = locale.countryCode;
    var fullKey = key;

    scriptCode != null ? fullKey += '_$scriptCode' : null;
    countryCode != null ? fullKey += '_$countryCode' : null;
    ...
  }

[darshankawar]

/cc @lesnitsky

[david675566]

+1 on this issue, it's really bugging me a lot that i had to edit out of scope files just to make Traditional Chinese works