Translation of Vermerk

If I wanted to integrate the above demo on our page, would we need to work with Vocabulix or do you have some other options? Could you send me some samples of other teachers, who integrated this demo?
He has helped me to take a decision and although I carried my entire laguage with me I returned to El Panchan for the night. We returned there in the early evening and I was happy to find a room.
In order to see it you have to complete a lesson. I attached a screenshot. I did not place any rating there, so that it will not demotivate some of the users, especially the fresh beginners.