I've a week of time off in which I'm learning Erlang. Now the other things I can do are learn lisp, learn about the insurance industry or the shipping industry etc. So in short I'm asking is learning a different language a waste of time, considering a MVP can be built with a familiar language like python.
a new domain will be worth more in terms of skill set than an new language, as long as you already know a modern language that companies actually use (IE: python, etc).