- Japanese by Shigeaki Wakizaka
- Simplified Chinese by Richard Qin
(below is a screenshot of the Japanese version running in Google Chrome)The main downside is the extra build times for GWT (and slight increase of war size - as GWT essentially builds different front ends (so the end user doesn't pay a price for all the versions available). But no one else should notice any downside to this.
If you are interested in helping out, take a look at them (any changes should be against the trunk version if possible).