I dropped Spanish which was the only language offered during my high school years. I regret it, and now I'm embarrassed to start learning as a uni-aged guy. I want to learn Mandarin because then I would know English and Mandarin which would cover like 50% of the populations speaking abilities.
Basically I just feel like a dumb American and being a Marxist I need to know another language.
You don't need to learn a second language to be a communist. If you can, getting organized is a far more important thing to do, even more than knowing your theory (although that's important too, but useless if you don't apply it). Learning a language is cool, but you don't need it.