I know there exists more generic typing tools. One idea I had was to make a "guts" to convert Golang -> Generic Typing -> All languages.

The reason to keep Golang as the source of truth is these types originate from the backend. So when you are writing the backend, it is just the easiest place to write and maintain things. No obstacles.

Golang types are also very simple. I imagine almost all Go types can be converted because of that.