English is a very widely recognised and accepted language it's use in most officially activities regardless of the number of different countries involved and bitcointalk forum I feel is not an exception to that.
Although the forum from my own observation have tried in tackling this issue by creating local boards needless to say that this has been helpful to many but still there are some hurdles I think that available.
Some countries like mine has various ethnic languages and it's practically impossible for them to be on the forum list. Although our country official language is English some are poor in there command of English so decides to hide in their snail shell.
Also the very enlightened member mostly communicate in English although some of them are from other countries but they command good English and can only help there own local board and the English section (normal forum language) this can deprive others of there immense contributions.
I really don't have a solution to this problem of my own but I bumped into a thread of beginners and help and followed a link and the idea and concept is quite significant to improve the communication in the forum.
http://fittotalk.com/english-talk/index.php.
This would really help so many that are scared to express themselves.
PS. So many has the idea but lack the communication skills