I make dpkg-reconfigure locales and uses es_ES.UTF-8, and after that I rebooted KDE but I don't notice nothing different.
I checked env |grep LANG g...@debian64:~$ env | grep LANG LANG=es_ES.UTF-8 LANGUAGE= g...@debian64:~$ The package kde-i18n-es that I have installed is the version 4:3.5.10-2 With this configuration I have some application completely in Spanish and others in Spanish and English together as for example konqueror. The local variable as LANG, LC_CTYPE or LC_MESSAGES I don't know exactly where is stored for my current user. Thanks, GUAN PS: Sorry Raúl for sending the message to your private. When I pressed "replay" your mail was set autmaticaly,