How can I combine different programing languages😕 like Facebook and Google or YouTube 😍 is there any one know the answer😓😒😶

Question

1) Google ~ C, C++, Go, Java, Python

2)Facebook ~ Hack, PHP(HHVM), Python, C++, Java, Erlang, D, XHP, Haskell

3)YouTube ~ C, C++, Python, Java, Go

And so on ................

Q) How these apps can combine code from different programming languages ​​into a single app or website. Can we do it too?🤤

If yes ,then how?🤔

Answer 1

They use independent pieces of software called microservices. Check this out:
https://microservices.io/

Answer 2

First learn these languages up to an advanced level. Then,
Google this complicated topic.