Well...I know there an specific thread dealing with portuguese brazilian translation but i don´t wanna bury a reply into it.
So, here i am test driving the version 8 BETA and we spotted a really bad translation. It is far from what it really means.
At the admin interface there´s the "home" button, which means "go back to start page". It was translated literally to "Residência" (the pt-br word for home). It should read "Página Inicial" or maybe simply "Início". Any of the two, but you should do away with "Residência".
I don´t know what´s the status about joining the translation effort....i would like to help if possible.