The first two tankoubon volumes will be released for the XX Salón del Manga de Barcelona in October, with the remaining ten coming out monthly thereon.
It's already been announced that Takeshi Obata will be at the convention, so he'll be on hand to sign a few!
Also greatly rumored is the fact that How to Read (Death Note 13) will also be released at the same time, along with Another Note and L: Change the World. Spanish translations for all three have been promised since 2009 - and nearly made it for the last Salón - but time constraints have always seen them moved further down the priority queue.
Hopefully the presence of Mr Obata has shifted them right back up it again for our Spanish brethren!
Definitely on the cards are translations of another manga illustrated by Takeshi Obata. The first two volumes of Blue Dragon will be available at the comic con, with the rest again following monthly.