I do not understand why MS simply has not stopped manufacturing international versions of Windows.
For Windows 2000 there are 26(?) Language Add-On's (MUIs) for lots of languages out there - which only need an english Operating System to be installed on.
There are even more and better MUIs for Windows-XP.
Having only one code base must be a huge advantage.
But i guess they haven't done this for backwards compatibility reasons... stupid!