That's ridiculous, if only because there are lots and lots of non-English programming communities already. French, Hungarian, Russian, Chinese obviously. Knowing English is a good tool, but the actual fact of the matter is that there already are monolingual Spanish-speaking programmers out of the 400 million native speakers of Spanish, and clearly you can't say that they shouldn't have a community.
A good analogy to use is c# and VB in .net. I was a VB developer and when C# was born, I didn't want to learn it because I can do everything in VB. It's the same framework so the language didn't matter. Overtime almost 99% of code examples and open source projects were written in C# and I ended up moving to c# and haven't written VB code (and don't want to) in several years.
My point is, you want to blog/collaborate in spanish/frensh or whatever language? Go for it. But you have just considerably shrunk your audience and network and greatly diminished your chances of giving or getting help.
PS: Wikipedia is different than code and is not a good analogy. If I want to learn about Cancer/Golden Retriever/Panama Canal/etc.. then yes, I want to read it in my native language.
