That's one thing I've never liked about civ's designers (and the closely related col designers); its horribly offensive sense of self importance and cultural arrogance. Who do they think they are? They're game designers, not historians, they don't have the right to say things like that. What did they do, look at pretty pictures of Spain and Portugal and say "these buildings look the same. They must be the same country", read a few pieces of Spanish and Portuguese literature and go "this looks like the same language to me (at least I can't see a difference), so it must be the same thing".
And it's not just colonization. It's other things to. In civ games, for example, France has been lead by Jean d'Arc, and India is lead by Gandhi, both of whom were never head's of state. What did the designers do, look at a list of historical people from those countries and pick the first names they recognize? And in the booklet that came with Civ chronicles, they said that they got complaints that there were errors in their civopedia, because there were wrong dates and names. And they didn't apologize!
But the thing that bothers me the most is that they don't seem to realize that they, of all people, don't have the right to say to simplify and diminish other countries and peoples, and they certainly don't have the right to change their history to suit their silly game's purposes. It's that horrible sense of entitlement and arrogance that's so typical of the american stereotype ('if it weren't for us, you'd be speaking german' comes to mind). And I'm done with my ranting about obscure and trivial subjects for today.