In country specific user communities there used to be an English section for foreign guest to that country; you get the idea.
Re: UK - How UK residents find each other on the whole Bitcointalk forum for UK specific topics, as only a small percentage of members from the whole community are from the UK?
Bottom line: not only language but location specific forum communities or topics still make sense.
There are a decent amount of Ukers here, i think people are even more likely to want to stay anonymous vs normal internet forums. People here seem less fussed about countries & borders when connecting with others.
Maybe someone could create BitBook like facebook for bitcoiners.