Not at the moment, but that's definitely our number one feature request. It takes a lot of work to add new languages, since all our curriculum would need to be rewritten.

Often a lot of new developers mistakenly believe the best thing for them to do is learn as many languages as possible, when learning the fundamentals of a single language is usually more useful.

Define “useful”.

To get a job? Probably. To really understand programming? I think learning a wide selection of different paradigms is more helpful.