Level 25 in German!!!
Wow this took forever. 2.5 years to reach this. I also grinded for three weeks through level 24, getting 400 XP per day or more. I have 2800 XP this week too.
This took a lot of time and effort. I think I might be about B-1. Now I'm giving up this tree to do the reverse one, and maybe Spanish-German and reverse!!