Reply To: Changing name of "Key Master"
Put this code somewhere in your theme functions.php
https://gist.github.com/4086011
Otherwise you can change the roles editing the bbPress gettext file. Check ‘\wp-content\plugins\bbpress\bbp-languages\bbpress.pot’, create a .po for your language (if you already hasn’t one) and change the string “Key Master” at line 3311. If you don’t know what I’m talking about I can generate the file for you.