In what language is it better to write p2p chat?

Question

Chats

exactly pure p2p (without a control server), non-browser chat, what language would you choose and why? advantages of the language in terms of networking.

Answer 1

It is better to write on the one you know.

Answer 2

And how will p2p chat work without a server if users are behind NAT?
How will users find each other without servers if they have dynamic IPs?

Answer 3

in c++
or you can just use the libtorrent function library