Auto Word Completion in British English System Wide

[Jolly Jimmy]

Is it possible to make OS X's word completion function use British English system wide? I've managed to make Text Edit use British English but not Safari for example.

Thanks for any help.

P.S. I'm on Snow Leopard.

 

[Ashka]

You have iTunes in British English which includes New Zealand & Australian English as long as you have the language set correctly in System Prefs. See Visualiser and Films

System Prefs > Language & Text > Language > Put British English at the top of the list.
System Prefs > Language & Text > Text > Spelling on the right > Drop down > British English.

Mail / Safari / TextEdit > Edit > Spelling and Grammar > Show Spelling and Grammar > Bottom of the window Drop down > British English.

iWork Pages > Inspector > Text > More > Language drop down > British English.

Have fun and keep hoping for more than iTunes

Sorry, you wanted Auto correction/completion not just spelling.