In Schoenhof's Foreign Books in Harvard Square, I recently picked up a great English-Spanish Telecommunications Dictionary. Its a fantastic desk reference if you ever have a need to rewrite an application from one language to the other, as was recently done with this English translation of FlashBlog.

Diccionario de inform·tica y telecomunicaciones (ingles-espaÒol)
Author: Moreno MartÃŒn, Arturo
ISBN: 8434428865
Published: 2001

If you're wondering, Oreja de burro is listed as the translation for Pig's Ear where the definition is a recursive entity relationship. I can definitely say that I never heard of Pig's Ear ever used in informatics circles.