This module is advertised as being J1.5 native. It installed correctly but did not display flags on the front end. The admin section shows error multilist field type not defined. Checking the module xml file and php code shows the code necessary for Joomla 1.5 to handle multilist field types has not been added.
Pity because the demo looks really neat using J 1.6 and I have heard good things about the Bing translate api.