On a first install, try to use the same device language

lib/domain/app_constants.dart

@@ -1,2 +1,12 @@
 //This order matches the one in the game, and the numbers represent each image
+import 'package:genshindb/domain/enums/enums.dart';
+
+import 'models/models.dart';
+
 const artifactOrder = [4, 2, 5, 1, 3];
+
+final languagesMap = {
+  AppLanguageType.english: LanguageModel('en', 'US'),
+  AppLanguageType.spanish: LanguageModel('es', 'ES'),
+  // AppLanguageType.french: LanguageModel('fr', 'FR'),
+};

lib/infrastructure/locale_service.dart

@@ -1,3 +1,4 @@
+import 'package:genshindb/domain/app_constants.dart';
 import 'package:genshindb/domain/enums/enums.dart';
 import 'package:genshindb/domain/extensions/string_extensions.dart';
 import 'package:genshindb/domain/models/models.dart';
@@ -43,21 +44,10 @@ class LocaleServiceImpl implements LocaleService {
 
   @override
   LanguageModel getLocale(AppLanguageType language) {
-    var langCode = 'en';
-    var countryCode = 'US';
-    switch (language) {
-      case AppLanguageType.spanish:
-        langCode = 'es';
-        countryCode = 'ES';
-        break;
-      case AppLanguageType.french:
-        langCode = 'fr';
-        countryCode = 'FR';
-        break;
-      default:
-        break;
+    if (!languagesMap.entries.any((kvp) => kvp.key == language)) {
+      throw Exception('The language = $language is not a valid value');
     }
 
-    return LanguageModel(langCode, countryCode);
+    return languagesMap.entries.firstWhere((kvp) => kvp.key == language).value;
   }
 }

lib/infrastructure/settings_service.dart

@@ -1,3 +1,5 @@
+import 'package:devicelocale/devicelocale.dart';
+import 'package:genshindb/domain/app_constants.dart';
 import 'package:genshindb/domain/enums/enums.dart';
 import 'package:genshindb/domain/models/models.dart';
 import 'package:genshindb/domain/services/logging_service.dart';
@@ -101,8 +103,7 @@ class SettingsServiceImpl extends SettingsService {
     }
 
     if (_prefs.get(_appLanguageKey) == null) {
-      _logger.info(runtimeType, 'Setting english as the default lang');
-      language = AppLanguageType.english;
+      language = await _getDefaultLangToUse();
     }
 
     if (_prefs.get(_showCharacterDetailsKey) == null) {
@@ -123,4 +124,28 @@ class SettingsServiceImpl extends SettingsService {
     _initialized = true;
     _logger.info(runtimeType, 'Settings were initialized successfully');
   }
+
+  Future<AppLanguageType> _getDefaultLangToUse() async {
+    try {
+      _logger.info(runtimeType, '_getDefaultLangToUse: Trying to retrieve device lang...');
+      final deviceLocale = await Devicelocale.currentAsLocale;
+      final appLang = languagesMap.entries.firstWhere((val) => val.value.code == deviceLocale.languageCode, orElse: () => null);
+      if (appLang == null) {
+        _logger.info(
+          runtimeType,
+          "_getDefaultLangToUse: Couldn't find an appropriate app language for = ${deviceLocale.languageCode}_${deviceLocale.countryCode}, falling back to english",
+        );
+        return AppLanguageType.english;
+      }
+
+      _logger.info(
+        runtimeType,
+        '_getDefaultLangToUse: Found an appropriate language to use for = ${deviceLocale.languageCode}_${deviceLocale.countryCode}, that is = ${appLang.key}',
+      );
+      return appLang.key;
+    } catch (e, s) {
+      _logger.error(runtimeType, '_getDefaultLangToUse: Unknown error occurred', e, s);
+      return AppLanguageType.english;
+    }
+  }
 }

pubspec.lock

@@ -225,6 +225,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
+  devicelocale:
+    dependency: "direct main"
+    description:
+      name: devicelocale
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.3"
   dog:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -24,6 +24,7 @@ dependencies:
   cupertino_icons: ^1.0.0
   data_connection_checker: ^0.3.4
   device_info: ^1.0.0
+  devicelocale: ^0.3.3
   dog: ^1.3.1
   enum_to_string: ^1.0.14
   flutter: