I'm from canada originally but live in india. I get people from the US and people from Pakistan being asshats because of their racist issues.
The reality is that when some one judges you, it's more of a comment on their character than a comment on yours.
Aside from that, there's like 1,000 brazillians on balamb island at any given time of day. It should either be instanced for region or have the outside levels set to 'solo play view' (or whatever it is when you can't see other players) in order to give fresh players a taste of the experience without a ton of other players in the area.
Or maybe you could put some Portuguese translation in the game so they can make it off the first island and get to the rest of the game?