What you learn from dedicating time to a new language, should not be the ability to program in it in 10 years, but to solve a problem you have now and hopefully

What you learn from dedicating time to a new language, should not be the ability to program in it in 10 years, but to solve a problem you have now and hopefully learn some new concepts. Pick what will keep you engaged - it's the "learning something" that matters if you're not explicitly trying to solve something.