dunno about sp3 but .. microsoft says :
Microsoft first introduced the Multilingual User Interface Technology for Windows 2000 Professional as ?Windows 2000 Professional Multilanguage Version? and was later extended to the Windows 2000 Server Family. This technology is now available for Windows XP Professional, Windows XP Embedded, and will soon be released for Windows XP Tablet PC Edition and for the Windows .NET Server Family.
hope that's helpful