Yes, you can start over for one or all of your courses by resetting your progress.
This needs to be done through the mobile app.
| 1. Go to the 'ME' tab and click on your profile picture | 2. Click on the 'Settings' icon in the top left hand corner | 3. Select the "Reset Study Progress" option | 4. You can now choose to reset your progress for all languages you've studied, or just for your current language course |
 |  |  |  |