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This doesn't change the dictionary you've set in the Spelling window (although it seems silly for it not to).
Yes, it does work, unless you have forced a language in one of the spelling dialogs. The default language for the spelling dictionary is indeed set by International preferences.

Once you have used the language menu within the spelling service, a second setting, stored in ~/Library/Preferences/.GlobalPreferences.plist (hidden file because of the leading dot in the name) will be added to override it. That setting is called NSPreferredSpellServerLanguage. If you remove that setting, spelling will follow the locale the next time spell check capable applications start. If you refrain from using the spell service menu to force a language, the spelling dictionary will continue to follow locale changes thereafter.

You may be right about iWork as I can't check that at present.
Yes, iWork does work that way. It ignores NSPreferredSpellServerLanguage and goes by your locale for new documents.
 
Sorry, but does anyone know how to use a proper English dictionary for OS X? I'm stick of it underlining with red words that are as they should be! :rolleyes: :confused: :)

Have you tried changing the Input Menu to the British input? It is found in the International Preferences window. Only check the British input then uncheck the US input. Don't mess with he other input setting s because it's a bit tricky, too tricky, to reset them. This is when you're still can't rid of the dotted red line. Solution was probably mention earlier: Press the learn button as fast as you want to rid of the dotted red line in the Spelling pane. It is now become British English in your Mac:D
You could check the "Show input Menu in menu bar" option at the buttom of the Input Menu pane to remind you which input you use.
 
Have you tried changing the Input Menu to the British input? It is found in the International Preferences window. Only check the British input then uncheck the US input. Don't mess with he other input setting s because it's a bit tricky, too tricky, to reset them. This is when you're still can't rid of the dotted red line. Solution was probably mention earlier: Press the learn button as fast as you want to rid of the dotted red line in the Spelling pane. It is now become British English in your Mac:D
You could check the "Show input Menu in menu bar" option at the buttom of the Input Menu pane to remind you which input you use.

I don't think that will work. The input method and the dictionary don't seem to be synchronized. That is actually something on my wish list for OSX: One shortcut to change keyboard layout and dictionary simultanously.
 
"American English"
"American Football".
"American President".
See a pattern? :D
 
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