German words never get strengthened
I have the German tree fully gilded, but quite a few words in the "Words" tab are at 1 bar, and say that they haven't been reviewed for months and months. I do at least three "strengthen skills" a day, and sometimes try to target the skills with the 1-bar words, but the weak words apparently never come up.
It might be a glitch, of course, but it could also be that those words belonged to the old version of the tree and have since been taken out of the course, thus never coming up again but still being listed in your personal words list.
Do you know if there is a way to verify this - to check what version of the tree I'm using, or if those words are still in the course?
According to the status news in the incubator, the German tree is currently in its fifth version. It seems likely that you started with a earlier version.
I am not sure what to do about the words, but you might try and contact one of the course moderators for the German course. They are also listed on the status page.
To clarify - there are hundreds of 1-bar words. Are all of these words that have been removed?
I am having a similar problem. I stopped using the program for two years. Now I have about 60 words at the bottom of my list that will not strengthen no matter what I do. I have even tried redoing the specific lessons they are listed in, with no luck. It's driving me nuts. Everywhere else says I am at full strength and no problems.