I've tried but unfortunately all of my searches return results about languages used for building models (e.g., Python, for some reason).
I figure it'd probably be a typed language with a meaty standard library, good type inference, and high-quality low-code packages that would require fewer generated tokens to do useful work. Or maybe a language with fewer ways to do basic tasks -- if there is somehow only one way to do a thing, then the generator would be most likely to write code using that one way. I'll fully admit that these guesses are naive and based on limited understanding of how LLMs work.