But let’s say it succeeds eventually. It means that there won’t be any new languages invented, and no updates to existing ones either. So AI will stick to a few current languages in their current states.
And the learning ability will be limited because human content is not being produced anymore. If that’s the case, AI should logically narrow it’s toolset to a single language which has capability of solving the widest spectrum of problems without the need for any further creativity.
What do you think this language is? Python? JavaScript? Rust? Something else?
ETA: also, human beings will still program, if only for fun and mental exercise. There will also continue to be an (ever shrinking) elite who can continue to be most productive by collaborating with AI rather than just asking it for things.
If true AI ever arrives, it will determine what it wants to accomplish and then, if computers or other machines are needed to accomplish any of the steps of a solution, imo AI will communicate directly with the machine in the machine's natural language (machine code in today's machines).
You are thinking like a human when you think true AI would need a "language". True AI will be fully capable of "thinking" in the natural language of the machines at the time (quantum machine code for example) without needing any higher languages that then get translated into machine code. IMO, those steps are needed by humans, but not by a true AI.