I just added a new language translation to my ZCS 6.0.1 and it's showing the wrong flag icon in the preferences tab in the web client.

I've edited some images.css, Preferences_all.js, images.js files as well as the flags.gif and img/ImgFlag##.gif files in the /opt/zimbra/jetty/webapps/zimbra directory and I still can't get the right flag to show and I can't even find the right file to edit or even remove the icons altogether.

Where can I edit which flag icon is to be associated with each language locale?