Easy way to change alert-window button text?

Is there an easy way for me to change the text displayed on certain system alert windows? The text itself is ok, but for this application I need “Proper” case…

For example, FileBasedDocument::saveIfNeededAndUserAgrees uses the following text on its alert window buttons:

“save”, “discard changes” and “cancel”

All i want to do is change this to “Save”, “Discard Changes” and “Cancel”

Go through the work with LocalisedStrings?