By “handle it manually,” I mean you don’t rely on the system’s automatic language detection—you control it yourself through instructions and logic.
So instead of just using the global prompt, you explicitly instruct the agent to only operate in those two languages and to either refuse or ask the user to switch when anything else is used. If needed, you can also enforce this outside the prompt in your workflow tool (like Make or n8n) by checking the detected language before the request continues.
There isn’t usually a separate “allowed languages” setting in most tools beyond the prompt itself, so it’s either enforced there or through your automation layer.
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