In some senses, this is what all the JVM languages are, or the WASM languages, or C FFI. You can build compatible layers between any languages, but at the end o

In some senses, this is what all the JVM languages are, or the WASM languages, or C FFI. You can build compatible layers between any languages, but at the end of the day, most people want to be able to read the libraries and other source code they’re working with. Scala, Kotlin, and Java can all interop with each other, but at the end of the day much of the libraries get rewritten between the languages.