Based on spanish V7.1 I do a quick spanish V7.3.1 for kickstart. This contains only the frontend. Its almost done 90%. The admin section is 100% english.

I dont speak any word spanish so I take the V7.1 and compare it with the 7.3.1 english to find the missing strings and changed placeholder. I replace it with english text so you have to review the whole frontend. But it should work and give you a good start. It would be nice if someone review it and put here an new version with more translations.
Attachments
UBBthreads731_spanish.zip (142.08 KB, 78 downloads)
spanish for UBB.threads V7.3.1

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen