Alphabetize all localizations + Chinese / Japanese update

I've alphabetized every single localization apart from de_DE.lang and ru_RU.lang, which have been taken care of in #530 and #539, respectively. There are also translations for the new items for Chinese and Japanese. As before, unsatisfactory or missing translations have simply been left out.

A tool that @fwilson42 and I made that checks for localization updatedness:

http://fwilson.me:8181/zh_CN/

Just replace the locale in the URL and you'll get a list of missing keys.