This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Yeah, That was what it was. You need to have a default properties file with the name similar to the message bundle that you have configured.
The default file can be used as a template for your other files.
Supported locales/default locales will be configured through files appended with locale identifiers.