So you right click a package, Localization, Generate property file, and
it writes a

So you copy the file, edit it, and rename it to _languageCode.

Then Import them back in.

So for the languages listed, I know some of the codes...

fr= French

But what are Chinese Simple and Traditional? I tried zh-CN and zh-TW
with no luck. (Looked at the email templates as a clue for what the code
might be).

Also what are the values for the following:

Portuguese brazil
Italian (_it I assume)