Include the preference with a specific question
Please reply in German with short everyday sentences. Keep Nora's name unchanged. Ask where I want to travel, and wait for my answer before suggesting a route.
If the chat has used another language, repeat the preference with the next turn. It can take a few exchanges for a changed instruction to be followed consistently. Remove conflicting language requests from the same context.
Use one name for each person or object
Keep proper nouns consistent when changing language. Choose one translation for an important place and briefly recap the current scene. Renaming the same location several ways can make a story harder to follow.
For practice, ask for a brief correction after the reply. Separating that request from a translation lesson and a new plot direction makes the turn clearer. Check important translations independently.
Inspect interface and audio support separately
Use the current Language control for offered interface options. It does not establish that every previous message, voice or media tool is available in that language.
Test a conversation instruction before deleting or resetting a chat you want to retain. Our prompt formats can help with style, and voice checks cover audio controls.