This module is a simple filter that, when enabled, will change your posts to 
"Pirate talk" on September 19th for Talk like a Pirate Day:
http://www.talklikeapirate.com/

Credits go to Richard Eriksson (http://www.richarderiksson.com/) and to 
Dougal Campbell (http://dougal.gunters.org/) for his word list (and similar Wordpress filter)