How do I know which keyboard locale file I'm using for my keyboard layout? I was reading a great answer to how you can extend the list of characters Lion shows you when hold down a key for a few seconds. The in answer he says:


  choose the keyboard file relevant to your locale if you are using a different keyboard layout


In /System/Library/Input Methods/PressAndHold.app/Contents/Resources/ I see quite a few files. I'm not sure how to figure out which one, precisely, I need to edit to make the changes laid out in that program. I'm using an english keyboard, but I'm in Canada. To the best of my knowledge though I'm not doing anything Canada-specific with my keyboard layout. It's a plain, english, Apple keyboard -- the kind you'd buy in any Apple Store in the United States.

The plist file that applies to me could be any of:

Keyboard-default.plist
Keyboard-en_CA.plist
Keyboard-en_US.plist
Keyboard-en.plist


How do I figure out which specific keyboard plist profile is the one I'm using?
It's determined by the list in the "Language &amp; Text" preference pane's Language tab.



The plist file that is chosen is the one that matches with the language in the list that is highest to the top that has a match.

For example: if your list shows "Canadian English, UK English, Spanish, …", Keyboard-en_CA.plist will be chosen, as it best matches Canadian English. If the list is "Português, Suomi, English, …", Keyboard-en.plist will be chosen, as it best matches English, which is the language closest to the top that is available. (The last is assuming that Portuguese and Finnish plists aren't available.) If there are no languages in the list that have plists present, the Keyboard_default.plist would likely be chosen.