Here’s what the developers had to say:
Yes its only Chinese for now, and some features are missing, but let’s not dwell on whats missing. The main functionality is there and the new themes as well. Features will be added one by one until it is on par with the Firefox version. Install now and you will receive all those updates automatically as they are added.
What are you waiting for? Download PeraPera for Google Chrome and start reading Chinese online!