- Add placeholder translation support for data-translate-placeholder attributes
- Fix hardcoded English text in AI responses (detective-help, ai-teacher labels)
- Implement proper language switching for input field placeholder
- Add fallback question translations for German interface
- Fix encouragement messages to use translation system
German interface now fully localized including:
- Input placeholder text
- AI Teacher labels (KI-Lehrer)
- Detective guidance messages
- Encouragement responses
- Fallback questions
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