Website backend in exotic languages ​​for this case like C, C++?

Question

Backend

Attention, question.
Do they write the server part of a web application in C ++, C in high-load projects?
Give some projects that use these languages ​​in writing the server side.
What exactly is written in these languages ​​in these projects?

Answer 1

If they reach this level of optimization, then they usually write a translator of the previously used language in C.

Answer 2

They write. I won't be specific. For example, flussonic is written in Erlang, some of the Google projects are written in Go. All sorts of SAP, SalesForce are based on a bunch of Java code.
They write, for example, fast-working binaries to perform one specific function in service mode, for example, convert media to another format

Answer 3

so webservers are mostly written in C++