1. Go to your settings and remember where to change the system language ;-)
2. Download the update.zip here
3. Copy the update.zip to the root of your sd-card DO NOT UNPACK
4. Tablet is off, sd-card is inserted. Press and hold Vol + and Power until update procedure starts.
5. Be patiend, wait until update is complete and tablet reboots.
6. Go to the settings and change the language from Chinese to whatever you like (hope you didn't skip step 1) ;-)
7. Enjoy :-)