First, please check file ./lib/configs/language.dark
and define your list language support
import 'package:flutter/material.dart';
class AppLanguage {
///Default Language
static Locale defaultLanguage = Locale("en");
///List Language support in Application
static List<locale> supportLanguage = [
Locale("en"),
Locale("vi"),
Locale("ar"),
Locale("zh"),
Locale("ko"),
Locale("ja")
];
///Singleton factory
static final AppLanguage _instance = AppLanguage._internal();
factory AppLanguage() {
return _instance;
}
AppLanguage._internal();
}
Then define your json lanuage in folder following your list language ./assets/locale/..

