I wonder if the training data for some languages has higher quality code. I can imagine some niche languages having a higher standard than, for example Python, which surely has a bunch of random buggy scripts in the mix.

On the other hand, even if that were true, I don’t know how important it would actually be since LLMs can generalise across languages well.

It might be best to pick languages where it’s just harder to screw up, the canonical example being to prefer typescript over JavaScript.