I've written a post about this here. While the LLM can technically output other languages, it breaks the AI because all the other parts of it require everything to be in English. I might add that translation feature next update, if I can make it work reasonably well.
Out of curiosity and maybe this can help, can the input and output be in typical Latin letters that English (and other languages) use, but the language it'self be different? Which is to say, using the phonetics of the other language, but with Latin letters.
I ask because I tried testing this once several releases ago, and it seemed to work fine. Though it was a very brief test, I asked an NPC to talk in Russian, but without Cyrillic and the translation seemed good. (using google)