Hi Luis, I had the same problem.
Here is how I solved:

In file /etc/default/locale
I added:
LC_ALL=it_IT.UTF-8 (of course you should insert your language equivalent)

In file .bashrc (hidden file in your home) I added:
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LC_ALL=it_IT.UTF-8

Also the following command helped:
sudo apt-get install --reinstall language-pack-en
sudo apt-get install language-pack-it (install your language pack)

Hope this helps.
Luca




2009/12/9 Luis Manuel Garcés Socarrás <lmgarcess@...>:
> Helo every one.
> I have  problem with locales on KDE3. I have tried everything but doesn't
> work. I tried to install with the CD I downloaded from pearsoncomputing and
> don't let me install. I shoud enter on the live CD mode and Install there.
> Then I select the language Spanish and install as usualy. But when the
> instalation finished the codification for Windows Drives. and when I run
> locale the is selected with "POSFIX" and I can't change to es_ES.UTF8 and any
> other that I use.
> I hope some body can help me.
> Your Ing. Luis Manuel Garcés
>
>