bbPress.org

The string Keymaster is being translated to Super Administrator(here)

If you login to http://translate.wordpress.org using your wordpress.org/bbpress.org username and password you can also suggest an updated translation and the Spanish translation team will review the translation and accept it or not.

The first link above is for the ‘development’ version of bbPress, upcoming 2.6 release, you should also suggest any translation updates for the current bbPress v2.5 here.

Once you have done the above you should let the Spanish translation team know:

Contacto