I have a theory that it should have a very different “personality” (probably more like writing style) depending on language because it’s an entirely different set of training data
In English chatGPT is rather academic and has a recognisable style of writing, if you’ve used it a bit you can usually get hints something was written by it just by reading it.
Does it speak in a similar tone, with similar mannerisms in other languages? (where possible, obviously some things don’t translate)
I don’t know a second language well enough to have natural conversation so I’m unable to test this myself, and may have worded things awkwardly from a lack of understanding
I haven’t tried anything complicated, but it does switch languages when you do. I’ve only tried GPT 3.5 though, and only with prompts that “ended” in one answer (not something like asking the AI to play characters or answer in a certain way, but questions that can be answered in a single message)