Since you said you have NO friends to spend time with on weekends, and language is one of the (or the biggest) barrier(s), why don't you start with making some

Since you said you have NO friends to spend time with on weekends, and language is one of the (or the biggest) barrier(s), why don't you start with making some friends who speak the same language as you do? I'm sure those friends would further have friends who'd speak different languages. It's awkward to go to some stranger and say you want to initiate friendship, but when people introduce you to others, it's a lot smoother and normal. Slowly, you might have people of multiple nationalities and languages in your group, and you'd be comfortable with all of them. Good luck!