There seem to be 25 levels. At the moment there is one progress bar showing the number of points you need to reach the next level. I suggest to add a second progress bar showing the number of points you need to reach the unreachable: level 25.
To the causal user, this would be a bad feature. Since it would burden them with 'yet another' lack.
But for people like you, at level 11. You still haven't finished the rest of the layout/framework of German. Don't worry yourself with too big of goals. Finish what you can. It's all about incremental change. Rome wasn't built in a day. :)
Thanks for your reaction! I don't worry myself, I just would like to know how long the road is. For me it is motivating to be able to see what is ahead, rather than just going on 'blindly'. Maybe this feature with the possibility to switch it off if it makes you stress? :)