It would be possible to set up a system of XP: we would win XP by learning new cards and by revising those whom we have to revise and we would also receive bonuses of XP more or less mattering according to our series of learning (the number of consecutive days when we go on mosalingua). According to the quantity of XP which we would obtain we could free bonuses as 1 free lesson of grammar or other one obtionnels packs to test them. Bonuses can also be the right not to go on mosalingua the day of our choice while maintaining all the same our series of learning. It would amuse us and would motivate us to go on mosalingua everyday!