When do I need Multilanguage updates?

We have nearly all PCs running English versions of W2K and XP, but frequently have other language options installed. For instance, one of our sites is a school teaching Japanese, they are running English XP, but have the IME and other "files for East Asian languages" and other localised fonts loaded. Do any of these options require updates for an languages other than English?

From the microsoft.public.softwareupdatesvcs newsgroup
Not that I'm aware of. The updates are applicable to the language of the OS only, so you should only need to sync and approve English updates if the client machines are running English version of the OS, even if you have installed are using IME or MUI.