To change your default language, follow these steps:

1. Place your mouse over your user name on the top right corner.
2. Select “Personal Settings” within the drop-down menu.
3. Look for “Change Language” on the vertical menu on the left side of your screen.
4. Select your preferred language.
5. Click “Change Language”.

And you’re done!

Note: You’ll have to log in again to see the change take effect.