Localization(Chapter 15 of Cocoa Programming for Mac OS X)

     The ibtool command, which is run from the terminal, can list the classes or objects in a nib file and can also dump the localizable strings into a plist. Here is how you would dump the localizable strings from the English.lproj/MyDocument.nib file into a file named Doc.strings:

     > cd RaiseMan/English.lproj > ibtool --generate-stringsfile Doc.strings MyDocument.nib