Well, that's a bit discriminating to non-English speakers if you ask me. There are always going to be those who haven't mastered the language and will therefor write in 'pigeon English' (for lack of a better term), and they may not be able to pass a literacy test. Besides, in my 6 years in BM I've not read a single letter that I wasn't able to understand, no matter how poor the writer's English was. And if I can't understand, I'll ask for clarification.
