Problem is, there's a limited number of factions in rtw, so you can't add in who you want. Hence, no Portugese, no Irish, none of the smaller peoples.

Not that us small ones would be integral to the game though. I can't see any benefit to the game in having an Irish faction, even if I'd love making Tara the capital of the world It's just of no value for anyone not Irish.

Same with the Portugese, there'd be a lot less demand from non-Portugese people for a Portugese faction, though I sympathise with their wishes.

Anyway, let's not forget game balance, a Portugese people would only start with 1, max 2 provinces, which would hardly lead to a dramatically balanced game, would it?