TF-297 Add LocalizationService to handle language translations

lib/main/localizations/localization_service.dart

@@ -0,0 +1,43 @@
+
+import 'dart:ui';
+
+import 'package:get/get.dart';
+
+class LocalizationService extends Translations {
+
+  static const defaultLocale = Locale('en', 'US');
+  static const fallbackLocale = Locale('en', 'US');
+
+  static final supportedLanguageCodes = [
+    'fr',
+    'en',
+    'vi',
+    'ru'
+  ];
+
+  static const List<Locale> supportedLocales = [
+    Locale('fr', 'FR'),
+    Locale('en', 'US'),
+    Locale('vi', 'VN'),
+    Locale('ru', 'RU')
+  ];
+
+  static final locale = _getLocaleFromLanguage();
+
+  static void changeLocale(String langCode) {
+    final locale = _getLocaleFromLanguage(langCode: langCode);
+    Get.updateLocale(locale);
+  }
+
+  static Locale _getLocaleFromLanguage({String? langCode}) {
+    final lang = langCode ?? Get.deviceLocale?.languageCode;
+
+    final localeSelected = supportedLocales
+        .firstWhereOrNull((locale) => locale.languageCode == lang);
+
+    return localeSelected ?? Get.locale ?? defaultLocale;
+  }
+
+  @override
+  Map<String, Map<String, String>> get keys => {};
+}