There are a lot of gnostic writings but they don’t hold much value. They were essentially rejected when they were written. You did ask an interesting question though, why we aren’t born with knowledge of every language if God wanted to diverse languages.

I’ve read theology about this as well, and the answer that I’m hearing at the moment regarding that has to do with the speaking in tongues that was released at Pentecost. On that occasion, there were people from many other regions assembled in Jerusalem and when they began to speak in tongues, people from foreign lands heard their own native tongue spoken clearly. The way it’s described, it seems even the dialects were correct.

It’s not clear if that was a miracle of being able to speak in a language they didn’t understand, or if it was a miracle of understanding. But it does seem to be a reversal of the confusion that was caused by the multiple languages at the tower of Babel, yet retaining the diversity and also creating unity. The inferred implication is that the same kind of understanding will be available in eternity when all of the brokenness of this world is restored with a new heaven and new Earth.