I’m sure it depends on the language but I’ve found ChatGPT works well for this purpose. I suppose the risk is that I don’t know what I don’t know so it very well might look fine to me but terrible to native speakers. Even so I’m fairly certain it’s better than DuoLingo which is more of a mobile vocabulary game than a language learning platform.
>I suppose the risk is that I don’t know what I don’t know so it very well might look fine to me but terrible to native speakers.
I general that describes what little I've used ChatGPT for.
I have it write something on a topic I know a fair bit about... "OK. that's pretty good. That's veering into weeds. That's not right. I'm going to work a bit on how this is structured; it's pretty formulaic. Needs some actual references and maybe a quote." If I had to start from not knowing anything, I'm not sure how useful it would be. But when it's "just" a matter of writing about a topic I know, ChatGPT can fill in a lot.
On the topic of languages, I had four years of high school French and have dipped in here and there (very dipping) since. If I wanted to put some effort in advance of maybe traveling some more in France, any recommendations? I know Duolingo but that seems to be more vocabulary.