I am Pete, and I'll be happy to assist with your Epson printer question.
To change the language back to English:
1. Press the Copy/Fax button.
2. Press the Menu button.
3. Use the Arrow buttons to select the Maintenance option (you will have to guess, as it will be in Chinese) - you should see the ink levels when you choose the correct option.
4. Press the Up arrow once when you are viewing the ink levels option - this will take you to the Language option. Press OK.
5. Use the arrows to select EN (English), then press OK.