This is great! Maybe some more tourist-related scenarios, like "ordering at restaurant", "resolving dispute about rental car crash" etc? :-)

The "next level" feature would be to get it to speak even simpler, with some hints about how to reply, for the beginners. I don't know how that would ideally look, but maybe a button to pop up some "key words" or phrases that one could use? (Even so, I found myself using the little I know, so it's obviously somehow working even though my knowledge is extremely basic.)

This is one of the places where I feel LLM's can do something good for the world, giving a safe playground for getting experience with speaking new languages without the anxiety of performing badly in front of other people – and hopefully make it easier to connect with real people in that language later.