First -- what distribution are you using?
Those two files are called 'libraries'. Type those two names into www.google.com/linux
and you can probably find them in precompiled fomat for whatever distro your using. Most likely an RPM.
Anyways, assuming that you're using KDE, I think you can change the language settings through the control panel or at the startup login screen. Gnome can do this, too, although KDE is my favourite.