INFRA: Set Up Project.

lib/service/localization_service.dart

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+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+import '../lang/app_en.dart';
+
+class LocalizationService extends Translations {
+  // Default locale
+  static const locale = Locale('en', 'US');
+
+  static final locales = [const Locale('en')];
+
+  // Keys and their translations
+  // Translations are separated maps in `lang` file
+  @override
+  Map<String, Map<String, String>> get keys => {'en_US': enUS};
+
+  // Gets locale from language, and updates the locale
+  void changeLocale(String lang) {
+    Get.updateLocale(Locale(lang));
+  }
+}