I have SuSE 9.1 in spanish, and almost everything is in spanish, some programs are in english, but you can choose to change it to spanish.

And I agree, we all have to write in english, english is the international language.
I get really frustrated when I take a look at SuSE mailing lists, forums, or anything else and it's in german. ARRRGGGGGGG!!!

I'm from Uruguay, so I'm a native spanish speaker, I also know portuguese and of course english.