If you are a mulitlingual Office 2003 user on Windows 2000 or Windows XP there is a nice tool that you can use to do the following:
The tool is available for free as an addon to Office 2003 and can be downloaded from http://www.microsoft.com/downloads/details.aspx?FamilyID=cc37e08c-1019-4ae8-a258-0d5412876dec&displaylang=en .
All you need to do is download it and follow the install instructions on the page.
I installed this for French.
Ran the program from the desktop.
The place that said "change the interface language" was not selectable, because.... "you need the MUI installed".
So, I installed the MUI. Or tried. "You don't have the correct version of Office."
I hate this kind of bullshit.