LLMs just can't come up with anything they haven't seen in their training data. Try any obscure language, and they will stumble. So for them to become fluent in

LLMs just can't come up with anything they haven't seen in their training data. Try any obscure language, and they will stumble. So for them to become fluent in a new language, you will need a massive corpus of data. Not only do you need to invent a new language, but you also need to create all the sample code for it.