Language tests added for other languages

Author: BrawlerXull

lib/app/utils/language/french_sentences.dart

@@ -2,7 +2,7 @@ import 'package:taskwarrior/app/utils/language/sentences.dart';
 
 class FrenchSentences extends Sentences {
   @override
-  String get helloWorld => 'Bonjour le monde !';
+  String get helloWorld => 'Bonjour, le monde!';
   @override
   String get homePageTitle => 'Page d\'accueil';
   @override

test/language/sentence_manager_test.dart

@@ -9,6 +9,28 @@ void main() {
       expect(sentenceManager.sentences.helloWorld, 'Hello, World!');
     });
 
-    
+    test('Should return "হ্যালো বিশ্ব!" for Bengali', () {
+      final sentenceManager = SentenceManager(currentLanguage: SupportedLanguage.bengali);
+      expect(sentenceManager.sentences.helloWorld, 'হ্যালো বিশ্ব!');
+    });
+
+    test('Should return "नमस्ते दुनिया!" for Hindi', () {
+      final sentenceManager = SentenceManager(currentLanguage: SupportedLanguage.hindi);
+      expect(sentenceManager.sentences.helloWorld, 'नमस्ते दुनिया!');
+    });
+    test('Should return "Bonjour, le monde!" for French', () {
+      final sentenceManager = SentenceManager(currentLanguage: SupportedLanguage.french);
+      expect(sentenceManager.sentences.helloWorld, 'Bonjour, le monde!');
+    });
+
+    test('Should return "¡Hola, Mundo!" for Spanish', () {
+      final sentenceManager = SentenceManager(currentLanguage: SupportedLanguage.spanish);
+      expect(sentenceManager.sentences.helloWorld, '¡Hola, mundo!');
+    });
+
+    test('Should return "नमस्ते दुनिया!" for Marathi', () {
+      final sentenceManager = SentenceManager(currentLanguage: SupportedLanguage.marathi);
+      expect(sentenceManager.sentences.helloWorld, 'नमस्कार, जग!');
+    });
   });
 }