How can i write a web application in more than one language like youtube?

Question

Youtube is written in more than one programming language?

Like C++ with Go, Java or other languages in backend?

Youtube Programming languages :

https://www.quora.com/What-programming-languages-are-used-at-Youtube&ved=2ahUKEwjYoJSz4-jpAhWbF3IKHeSXBPgQFjAFegQIEBAJ&usg=AOvVaw3EgxiC8ZdG-4fUlB-COHtD

Please help me too

Answer 1

probably there are separate modules (services), compiled and executed separately
or sometimes separately compiled to native code, linked in one executable module.

Answer 2

Thanks, But You have any example for this any Code link Please! I need