Probably a bug : "You have practiced all of your words. Try doing some lessons or translations."
I kinda have a bug lately ... I seem to have dozens of skills that are not golden, but i get this when i go to strengthen your skills I mostly get "You have practiced all of your words. Try doing some lessons or translations." ... even after like 2-3 days of not learning anything, I just get like only one strengthen lesson after which i get the message again (and i still have lots and lots of not-fully-trained lessons). Thanks for any future help.
It seems that Duolingo is try to force us learning new stuff instead of practicing things we believe we do not master. I think they should be more focused on fixing the "weakening algorithm". Doing a new lesson and achieving that lesson is usually a peace of cake. But mastering this lesson is not. By doing a new lesson, everybody will finish this probably within 10 minutes. That does not mean, we master this. Redoing this lesson at least 4 times, and doing this lesson within 20 "questions-answers" instead of 35 is a good indication of mastering that lesson.