Earlier quoted context omitted.
I don't think so within the EU (perhaps in France ... chuckle), but I suspect it'd be more problematic in for instance Japan, Korea or China.
I'm a french living oversea and so write and think mostly in english... Most of my friends in France work in french and their english level is often quite weak (especially when it comes to oral communication, one of my teacher at university used to read 'done' as do-one, case as 'cahse' and so on, it was rather funny...) When working in japan, none of my japanese coworkers could speak or read english (even worth than…
But your last sentence seems really harsh. Good communication skills are so much more important in real life to have work done.... I know a few good programmers in France for whom reading english is a lot of (sometimes necessary) pain. I'm sure more contacts with foreigners would give them a incredible confidence/motivation boost.