In which language is SoloLearn developed?

Question

It compiles many languages in the same compiler. How is this possible?

Answer 1

Actually it's Not like that
Once you post a code in any language and try to run it, it goes to the server and from there it is compiled and the the output comes to you.

Answer 2

@ATD
you just go to the Sololearn website

Answer 3

I have used on mobile only which has already impressed me...How is it on web?

Answer 4

It is a project, that works on web and mobile. Which one interested you?