grails-localization
The localizations plugin alters Grails to use the database as its means of internationalization rather than message bundles (property files) in the i18n directory of your application. All property files in the i18n directory of your application (but not subdirectories of i18n) are automatically loaded in to the database the first time a message is requested after the plugin is installed.
Importing
There is also an import facility (at a URL similar to http://myServer/myApp/localizations/imports) to load subsequently created property files - often the result of later installation of plugins. A 'message' method is added to all domain classes and service classes as a convenience. An 'errorMessage' method is added to all domain classes that can set an error message on either the domain as a whole or on a particular property of the domain.
CRUD
A localizations controller and CRUD screens are included with the plugin. The screens assume you are using a layout called main. Your database must be configured to allow the use of Unicode data for this plugin to work.
Caching
Localizations are cached for speed. You can reset the cache by going to http://myServer/myApp/localizations/cache