Answer 1

Hi, your question is unclear. Please specify what you need.
Thanks,
Check rules please :
https://www.sololearn.com/Discuss/1316935/welcome-to-sololearn-forum/

If you mean language as weapon, then you can see every user's weapons or at least the languages that accept challenges, by trying to challenge him. Then a list with the user's weapons is appearing.

Answer 2

python, php, Node.js

Answer 3

Html php

Answer 4

JS