Hi,
I just translated the core documentation into Spanish. It can be found here.
http://hibernar.org/documentacion/castellano.html
The page is at your disposal, if you want to copy it to the main documentation page.
I am trying to get someone from the developers list to acknowledge this, but no one answers ... The postmaster itself is unresponsive, I got no confirmation email when trying to subscribe to the list.
If anyone from the Hibernate team is reading this: did you get my translation? What do you think about it? Do you want it?