angular-translate/angular-translate — pull request #469 by tspaeth (2014-03-22 14:07:57+00:00)
Title: feat(missingFallbackDefaultText): enables a feature to return a default ...

...text for displaying in case of missing translations including fallback stack

In case you have defined a missingTranslationHandlerFactory, you now have the possibility to define a return value which is set instead of the translationId.
This gives a lot of flexibility for certain use cases.
Example factory:
$provide.factory('customTranslationHandler', function () {
return function (translationID, uses) {

};
});