I personally would be cautious learning an extra language through a tool like this though, especially for a huge list of supposedly supported languages like this. Chat-GPT gets basic concepts like verb suffixes wrong, that is, explaining those concepts and generating example sentences, when I was trying it out a few months ago. I wouldn't mind conversations feeling a bit awkward or unrealistic, (EDIT: as they do here), but I wouldn't trust AI tools atm to get sentence structure, spelling and pronunciation (!) all completely right which is imperative for such a tool to function (and this one didn't for the two languages I tested).
If we assume the AI is already at that level, it would be trivial to have it show translations to user's native languages instead of only to English and excluding a number of potential revenue-generators for the capitalist machine ("learners").
Your prompt leaked in the text box when I pressed the Start Conversation button multiple times, and the site seems to be getting HN-hugged-of-death right now.
Also, adding to the person who mentioned this being close sourced, if a "deep-rooted desire not to look foolish in front of others" was among my reasons not to talk to a stranger in an extra language, I don't think I'd be any more likely speaking into a microphone, alone, in a room, like I'm conducting my biannual mandatory TOEFL© test every two years.[1]
[1]: This one is actually worse because you're in a room with 10+ others simultaneously talking into a computer screen, not talking to a person but just having your voice recorded, and it's outrageous ETS is getting away with charging people like 200 bucks (getting to see feedback for your grade is extra)