I completed all work on Level 11 but I am not allowed to move to the next level. What's the reason?
The reason there are no more lessons is because you have completed them all. Nice job! If you want to bring your level up higher (up too the max of Level 25), you can earn more XP. Do this by reviewing lessons, or translating documents in Immersion. Also, on your profile you can see how many points you need to move on to the next level. Look at the side bar, under "Languages". Happy learning!