Great feature! Thanks so much for implementing, Mark and team!
One remark, though: While it’s very helpful to create tags for different grammatical forms of a word - e.g. “tú” or “condicional” in the screenshot above - I think it’s not so useful to create tags for the base form of every word that you save as a LingQ - e.g. “definir” or “definirse”. I prefer to have tags only for the aforementioned bigger categories because if you really would add all base forms and infinitives as a tag, you’d end up with a sheer endless list of tags which kinda defeats the purpose of creating tags in the first place.
Therefore, it would be very cool if you could add a feature with which we could choose which tags the system creates. I hope I could get my meaning across.