As suggested in another question, I'm asking this here.
I tried the procedure pointed out in the referred question, but then when I try to log in to Battle.Net from the Diablo 3 game, I get the following error message:
The client does not match the account's native language. Please use the game's original client. (error 81)
I bought my copy of Diablo 3 in Brazil. I think that this is the problem: I can only download the Brazilian Portuguese game client from Battle.net website. Other languages are not available for me to download, even though I use my battle.net account in english.