Hi Chris,
To add to Dian's reply, the answer can depend
on which 'language kit' you're referring to.
There are Windows language tools, there is
a MS Office MultiUser Interface (MUI) Edition
for volume license users that has multiple language
and proofing tool kit CDs and there is the
MS Office Proofing Tools Kit optional companion product
for MS Office products.
For the Office products the resource kit may be the
information you're looking to find
http://office.microsoft.com/office/ork
====
I have been asked to install the full language kit to use on an image in all
of our offices. How do I do this? Thanks >>
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Let us know if this helped you,
Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*
Office 2003 Editions explained
http://www.microsoft.com/uk/office/editions.mspx