Ability to load language config for modules, and automatically add the 'intl' module if there are any languages defined
Add the language list to the generated config file
Support in the controller to handle language file requests
Able to serve up almost all of the language files
Ability to load the language file from a messages file in the module area, including some work to ensure we load it in UTF-8 and not ISO-8859-1
Support for when a language code isn't specified