Say which parts of the reply should use each language
In Profile settings, set Preferred Chat Language to the language you want for replies. The globe menu changes the interface language separately. If a character switches languages despite that preference, restate the language in the conversation and try another model available to your account.
For a single-language exchange, include narration in the request: 'Please use German throughout, including descriptive passages.' For a bilingual scene, define the split, such as one language for speech and another for narration, so the expected pattern is clear.
Use consistent names for important people and places. Repeatedly translating one name in different ways can make it look as though the story has introduced several subjects instead of referring to the same one.
Look at language examples in the definition
A definition full of English phrases can keep influencing replies toward English. Adapt those examples if you own the character, or look for a character already written for the language you want. A language request has to work alongside the existing instructions.
We offer models with different multilingual strengths. Among the models your plan provides, try an ordinary exchange in your chosen language before beginning a long story. The test can help you notice awkward wording or inconsistent replies early.
Restate the language without resetting the plot
When a reply unexpectedly changes language, repeat the preference clearly and carry on from the latest event. You can address that specific problem without reciting the entire story again.
Dialect, technical vocabulary and ambiguous names can still cause errors in generated text. A roleplay reply is not a certified translation and should not be treated as authoritative medical, legal or financial wording.
Questions
May I chat in Arabic, Japanese, Spanish or German?
You can request those or other languages and use an available model that supports your choice. Consistency varies with the model and definition; a translated interface does not itself ensure replies in the same language.
How do I stop a character drifting back into English?
Restate the desired language and inspect the greeting, definition, examples and recent context where you can edit them. English-heavy material in those places may be pulling the replies away from your preference.