I´m from Germany and I use the web almost exclusivly in English. Do I think that it would be cool if every programmer would understand English? Yes. But is it realistic? No.
On my dayjob I have 2 co-workers who are 45 and 50 years old. They can´t speak English and I´m sure they will not start to learn another language now.
I think it´s dangerous if people who are learning a new language take part in programming discussions on the web. People could think they know what they say, but say something else and give wrong advice.
The problem with documentations are the translators, not the languages 