Re: extended profiles
In English it is in the BuddyPress Plugin – xProfile.
Click on:
BuddyPress > Profile Field Setup
The instructions read:
“Your users will distinguish themselves through their profile page. You must give them profile fields that allow them to describe themselves in a way that is relevant to the theme of your social network.
NOTE: Any fields in the first group will appear on the signup page.”
And it works very well! 
