I don't know what browser you are using.But,if you use 360 browser,you can be aware this have three bar at the top right of the screen. Click it with the mouse. then click the last second lines. On the left side of your screen, click the last second lines. You will see the character "100%". After,click the one which under it. Then, click on the lower left corner ,select English. This is all i know. If you are a foreign student , I think you can ask help for your teacher or friends. My English is so poor. And even you set it successfully, only part of the site support. If you are free, I hope you can correct my mistakes. I am also very happy to help you learn Chinese