Enhance exercise generation for family conversations and feelings & affection

- Updated multiple choice exercises to include randomized wrong options for improved engagement and challenge.
- Added new exercise types for reading aloud and speaking from memory, enhancing interactive learning experiences.
- Improved gap fill exercises with clearer instructions and multiple variants for better user understanding.
- Enhanced the vocabulary service to support new exercise types, ensuring robust answer checking and feedback mechanisms.
- Updated localization files to include new instructions and messages related to the new exercise types.

frontend/src/i18n/locales/en/socialnetwork.json

@@ -392,7 +392,20 @@
                 "allLessonsCompleted": "All lessons completed!",
                 "startExercises": "Start Chapter Test",
                 "correctAnswer": "Correct Answer",
-                "alternatives": "Alternative Answers"
+                "alternatives": "Alternative Answers",
+                "notStarted": "Not Started",
+                "readingAloudInstruction": "Read the text aloud. Click 'Start Recording' and begin speaking.",
+                "speakingFromMemoryInstruction": "Speak freely from memory. Use the displayed keywords.",
+                "startRecording": "Start Recording",
+                "stopRecording": "Stop Recording",
+                "startSpeaking": "Start Speaking",
+                "recording": "Recording...",
+                "listening": "Listening...",
+                "recordingStopped": "Recording stopped",
+                "recordingError": "Recording error",
+                "recognizedText": "Recognized Text",
+                "speechRecognitionNotSupported": "Speech Recognition is not supported by this browser. Please use Chrome or Edge.",
+                "keywords": "Keywords"
             }
         }
     }