It gives the ability to parse gettext .mo files and thus give you the possibility of easily implement internationalization (i18n) to your flash apps. If you dont know what is gettext, read about it at the Gettext GNU Project home

Actually a more detailed information can be found here: http://www.sephiroth.it/phpwiki/index.php?title=Gettext_actionscript3

A sample demo can be found here: http://www.sephiroth.it/test/flex/2/gettext/main.html

API Documentation can be found here: http://www.sephiroth.it/test/flex/2/gettext/asdoc-output/