If you have any english speaking people in your household you may want to
invest in the Ultimate Edition. The ultimate edition comes with language
packs wich allows you to change the language that the OS actually displays on
a per user basis. Keep in mind this is totally different than the prior
versions of windows. If you allready have a valid copy of XP/2K on that
machine you can choose to purchase the upgrade edition of Vista Ultimate or
the Full Version. If you do not have a prior OS you will need to purchase the
full version.
"Multi-language support
An interface language controls which language a user sees in the Windows
Start menu, in the help system, in built-in management tools, and in Windows
dialog boxes. Windows Vista Enterprise and Ultimate includes all available
interface languages in one offering. Access to all worldwide Windows
interface languages enables organizations to build a single deployment image
that can be used worldwide and to deploy individual PCs that simultaneously
offer different interface languages for different users. " (I added Ultimate
to this, as it is only available to both these versions. If you seach MUI you
will see this.)