How do I mark a word as rare?

Question

Vim has the commands zg and zw to mark a word as good (correctly spelled) or bad (incorrectly spelled), respectively. Is there a similar command to mark a word as rarely-used?

(It’s possible to manually append the word plus /? to the spell file, but this is a lot less convenient than just putting the cursor on the word and typing a couple of keys.)

Answer 1

Since 8.1.1838 (Aug 2019) you can use the :spellrare command, before that there is no way, other than manually editing the ~/.vim/spell/en.utf-8.add file.