A language's main mission is to help people communicate (join rather than separate or divide). I understand that people would prefer a SO site on their language (I'm spanish), but in this case it's the opposite to the Divide and Conquer algorithm.
In this case, dividing the manpower into groups means a loss in every sense. If I have a question I would make an effort to ask it in the main (english) SO site, because it would really be easier to get a good answer.
This is not a negative to a minority, but an invitation to keep together because this is what makes SO great.
UPDATE:
... anglophonic imperialism...
... old imperialism...
English language is multiplying into new languages for such a big
amount of irregularities. In 200 years, it simply won't exist.
... whoever has the biggest stable economy, exerts the most influence in
the world culture (especially now with globalization); the french, the
british and the german were there, and now it's the american's turn
(not for long though).
Communication should be fair, equal to both sides, and if someone
refuses to use other languages; you simply can't say it to be fair.
It's a culture smashing all others in a certain environment; like a
big company, who buys smaller ones and sends thousands to
unemployment. Sorry, I'm diverging; but I think you get the analogy.
It is important to respect culture; Esperanto has a culture including
such mutual respect. English doesn't.
@JMCF125, don't you think this has gotten out of hand? It's getting really off-topic. In other Q&A sites (politics.stackexchange.com), this could be discussed and you would probably get upvoted, but this is not the place to discuss about the roundness of Earth. English is nowadays the best language to get the highest number of programmers to share their knowledge and expertise. And this is our big treasure: sharing knowledge. Creating a big messed up site with multiple languages is not the solution but a problem for this. I could agree with you in many of your statements, but SO is not the place to fight your battle.
P.S. As I said, I'm spanish. Spain is a country with 5 co-official languages, which some people continuously try to use ones against the others using similar arguments to yours. Likewise, Spain is a country with a history of colonialism and world domination ("The empire on which the sun never sets"). Also, I'm from the Canary Islands, where the spanish came and nearly extinguish our people (Guanches), our culture and our language (Guanche or Tamazight).
I know what you are talking about, but this is simply not the place. IMHO, a multi-language main SO site is a really ugly and pointless solution.