I understood this language like being something similar to assembly.

Many compiled languages can compile down to assembly and which can be used to debug/optimize/understand the compilation process.

Assembly is so close to the underlying hardware that it's not very practical for us humans to write software with it.

> Can it interact with other languages?

I'd say this is probably similar to the story with assembly. Assembly cannot interop with C. But C can be compiled down to assembly (not sure that counts as "interact" to you).