Do you ever get a document in a different langue that you do not understand get Windows Live Translator !
It works for both Office 2003 and Office 2007 !, just download the installer here.
Here are some details for both Office versions:
Office 2007: http://blogs.msdn.com/translation/archive/2008/08/06/office-document-translation.aspx
Office 2003: http://blogs.msdn.com/translation/archive/2008/08/11/office-2003-setup-instructions.aspx