The problem is in spain we translate everithing. Films, books, and sometimes videogames. If you want a game to be famous in spain, you NEED to translate it, because only gamers will play, not casual gamers.
Also, a complicated game, like Space Empires IV, contains a lot of things to read. So, its wise to translate a game, but also its more hard.
I have no real problem with english game, but i know a lot of people who doesnt. I want to help them. Why? Eerrr.... i want them to play that game.