I think the communication barriers by language tend to be a lot larger than we think, I was hooking up with this guy and his English was nearly perfect; he actually has an advanced degree in the English language, but still there were communication issues. For example, when we were trying to make plans and he asked what I wanted to do I said I'm down for anything and he interpreted that as me saying I don't feel well enough to do anything (as in I'm feeling down)
Hell, on Grindr I can't count how many times someone says something to me and I have no clue what the fuck they're trying to say