Setting up traslations.

Hi.
Well a week ago Blender 2.62 get so strange behavior so i uninstall it and re install-it, that problem got solved but all the settings including the translation put themselves as their default values.
The Problem is when i try to activate in system the language in Spanish the combo box never appears and then crash Blender.
I was trying to do it trough the python console but i can’t find any function or module to do it.
By the way sorry my english.