Known words amount not accurate

Hi, i deleted a language to restart from zero, it set number of known word to zero, but when i am on a lesson, some words are still highlighte… so my real number of known word is not accurate…

Are you saying that some words still remained white after you restarted a language? Or some LingQs (yellow words) remained? If so, please note that sometimes it can take more time for language reset to fully complete. Take another look now and let me know if you still have issues.