Umm, WinXP does support Australian English for one, I know that. Whenever I install Windows on a computer, when the language and regional options come up I always set the keyboard layout to 'English - Australia', and the same with date time, currency, location, etc... The options are all there. But, the settings only work in Word and such, if you goto 'Color' options in display, it doesn't show as the Australian spelling. Whether Vista will support it or not... who knows?