Not sure if this is what you mean, but you can set the LANG environment variable to en_US.utf8:
You can put this in your .bash_profile/.bashrc
Alternatively, edit /etc/profile.d/lang.sh and/or /etc/profile.d/lang.csh to make the change system wide.
You'll also need a font that has glyphs for the characters you want to see. The DeJaVu fonts have quite an extensive range.