Sorry, I was pretty confused.
The "Subir Fichero" option simply uploads a file. The Upload Archive option does loads a zip file and unpacks it (quite slow).
The thing is that Upload Archive didnt work (or was extremely slow) in the bundled installation. I installed a brand new 4.2.2 JBoss Ap and installed the portal in it using a MySql DB and it worked ok.
The spanglish (Spanish and English mixture) is still present.
Thanks anyway and sorry for the confusion.