[nl]

> My understanding/experience is that LLM performance in a language scales with how well the language is represented in the training data.

This isn't really true. LLMs understand grammars really really well. If you have a grammar for your language the LLM can one-shot perfect code.

What they don't know is the tooling around the language. But again, this is pretty easily fixed - they are good at exploring cli tools.