Hi ramonriera,
Have You loaded setfont.tcz? And do you start an appropriate font in Your /opt/bootlocal.sh? In order to have the Cyrillic fonts in console I've added to my bootlocal.sh the line
setfont UniCyr_8x16
where UniCyr_8x16 can be found among another fonts located in /usr/local/share/consolefonts. There are a lot of fonts in this directory, I am pretty sure that Spanish is present, but I don't know what exactly the name is.