Pedro G. Martinez has created a non-public CakePHP group in Spanish. The description of the group is:
Un grupo de discusión y ayuda sobre topicos relacionados con el fabuloso framework CakePHP
Update (2006-04-04): This group does not exist anymore.
Update (2006-04-05): The group does still exist, but the url has changed: http://groups.google.com/group/CakePHP-es