Will lingqs automatically be moved from level 4 to “known,” or do we have to do that manually?
A word becomes known when it moves from status 3 to status 4. The green check only means it will no longer be added to your Daily LingQs.
Any LingQs that you answer correctly twice, get moved up 1 status level. That includes status 4 words too.
So the status of a word can either be changed manually, or automatically through flashcard study. Which means if you don’t use flashcards (like me) it can only be changed manually.