I don't think that applies in this case, I'm from Costa Rica but learned english very young (ironically, in Scotland) and I've seen how limiting it can be for non english speakers, most tutorials, documentation, books and just resources in general are either not available in spanish or not as rich; it doesn't help that most programmer jobs are for US based companies. A friend sometimes shares gnu/linux news from some a latin-american or spanish site and I kinda feel sad when it's something I read a week ago in HN.
Well, to be honest - MeFi and BoingBoing also get the good stuff a few days after HNN. And most programming jobs aren't in Indiana, either, so English alone isn't enough.
I grant you your point, of course: It's fair enough to say that lack of English is a disadvantage - but I don't think the answer is to say there shouldn't be a more vibrant Spanish-language community than there has been.