i think a perfect place to start is the html version of the MacPerl book by Chris:
http://www.ptf.com/macperl/ptf_book/
Of course and really copy of the book is even better so i can really recommend you to buy it ;-)
I'm not aware of any spanish docu but would be very interested in something like this. MacPerl y Español, ¡que bueno! :-)
Regards, Martin
--
"I believe that forgiving them is God's function.
Our job is simply to arrange the meeting."
General Norman Schwartzkopf