That is also true, Onestone. What about making more effort to make friends? Language barriers - well, if the people that are struggling have someone to talk to in English - won't that help them to learn? you could learn other languages too - hello, how are you, etc. Showing an interest in another persons language and culture is very flattering and a good way to break down barriers.
Re men in one room women in another...I've experienced this too. My dh is from Kenya and I have been to gatherings where the men and women seperated. It was odd at first, because I'd never experienced it, but you just have to accept it as another, equally valid way of doing things. (As it happens, the women at those gatherings were not over friendly to me, they didn't want me there, but that's another story! )