Enhance speech input handling in VocabLessonView: Introduce fallback instructions and placeholders for unsupported speech recognition in English, German, and Spanish. Update exercise instructions to dynamically display fallback options, improving user experience for speech-related exercises.

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

@@ -437,6 +437,8 @@
                 "recordingError": "Aufnahme-Fehler",
                 "recognizedText": "Erkannter Text",
                 "speechRecognitionNotSupported": "Speech Recognition wird von diesem Browser nicht unterstützt. Bitte verwende Chrome oder Edge.",
+                "speakingFallbackInstruction": "Dein Browser unterstützt hier keine Spracheingabe. Schreibe deine gesprochene Antwort stattdessen als Text auf und prüfe sie dann normal.",
+                "speakingFallbackPlaceholder": "Schreibe hier, was du sagen würdest ...",
                 "keywords": "Schlüsselwörter",
                 "switchBackToMultipleChoice": "Zurück zu Multiple Choice",
                 "languageAssistantEyebrow": "Sprachassistent",

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

@@ -437,6 +437,8 @@
                 "recordingError": "Recording error",
                 "recognizedText": "Recognized Text",
                 "speechRecognitionNotSupported": "Speech Recognition is not supported by this browser. Please use Chrome or Edge.",
+                "speakingFallbackInstruction": "Your browser does not support speech input here. Write down what you would say instead and check it normally.",
+                "speakingFallbackPlaceholder": "Write what you would say here ...",
                 "keywords": "Keywords",
                 "switchBackToMultipleChoice": "Switch back to Multiple Choice",
                 "languageAssistantEyebrow": "Language assistant",

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

@@ -434,6 +434,8 @@
                 "recordingError": "Error de grabación",
                 "recognizedText": "Texto reconocido",
                 "speechRecognitionNotSupported": "El reconocimiento de voz no es compatible con este navegador. Usa Chrome o Edge.",
+                "speakingFallbackInstruction": "Tu navegador no admite entrada de voz aquí. Escribe en su lugar lo que dirías y compruébalo normalmente.",
+                "speakingFallbackPlaceholder": "Escribe aquí lo que dirías ...",
                 "keywords": "Palabras clave",
                 "switchBackToMultipleChoice": "Volver a opción múltiple",
                 "languageAssistantEyebrow": "Asistente de idiomas",