The conversation I had was about lost luggage at the airport, and what it looked like, and what was next. That's a pretty adult conversation. I did not understand what the "next steps" were without the translation, but I guess I did okay with the rest.

I did it in Japanese, which had the added problem of not knowing what some of the words were, though I recognized more of them when I had it speak them out loud.

It's possible I'm just not ready for a tool like this, though.