This is an odd one.
While an AI does have the capacity to respond in any language that it has learned, this is a bit strange.
My native language is ENGLISH, and yet it will, on its own start responding in GERMAN, SPANISH, SWEDISH, RUSSIAN. I have to literally tell it to keep all responses in English. 9 or 10 responses later, it will start responding again in another language.
Anyone else experience this ?
might be relevant to rules/skills/codebase? perhaps if codebase has all non-english comments?
I do not think agent has access to your geolocation or system preferences, but I might be worng
Even if it does have access, that doesn’t explain that CURSOR responds in multiple DIFFERENT languages within the same chat unprompted.
Cursor has no control over this, this is being done by the underlying LLM. Hence the question whether there is anything pointing to non-english languages.
That’s what I thought. But since this was done in Agent mode WITHOUT selecting an actual agent then I thought where is this coming from, hence the quandry.
same here. for me it is in combination of english and indonesian in one response. just happened today and I don’t think I update anything
Hey, this looks more like a model behavior thing than Cursor itself.
Cursor doesn’t control output language — it’s the model that decides based on your prompt + context.
From my own experience: I’m a native Indonesian speaker but I work mostly in English. Sometimes when using GPT or Claude, if my code/comments/docs have any Indonesian text mixed in, the model starts replying in Indonesian. Mixed-language input often triggers mixed-language output.
A few things that would help diagnose:
• Which model are you using? (GPT 5.5, Claude, Codex, etc.)
• Any non-English text in your codebase, comments, file names, or rules?
• Can you share a screenshot of when it happens?
If it keeps happening with pure English input on a clean repo, that’s likely a real bug — worth submitting to the Cursor bug report forum so the team can track it.