localized function
Picks the appropriate localized string based on the current app locale.
NTUT services return Chinese (always) and English (sometimes). For Chinese
locales, prefers zh; all other locales prefer en, falling back to zh.
Implementation
String localized(String? zh, String? en) {
if (LocaleSettings.currentLocale == AppLocale.zhTw) {
return zh ?? en ?? '';
}
return en ?? zh ?? '';
}