No offence, but you clearly haven't studied this and are making some wrong assumptions here.

> Neural networks are approximators being fed human intellect.

They're not "approximators", that's a far too simplistic way to think of them.

Neural nets create models and deep layers of abstraction around the data we feed them in the same way your brain creates layers of abstractions to reason about the world. AIs can use these abstractions to come to come up with novel things no human has ever thought.

> Therefore they can only approximate the intelligence of humans

They're not just being fed human data though... Modern AIs are typically trained on huge amounts of synthetic data. This is why AlphaZero got so much better than humans at chess and Go - they're not just trained on human data but they generate their own data and train on that. Similar techniques are being deployed on SOA language models too.

> Even if the llm speaks an alien language, it should be similar to human intellect

Is AlphaZero similar to a human chess player? There's no reason to assume this.