The cultural-awarness tag is missing an
Is that something a high rep user (like me) can fix?
If so, how?
Good question. Now you could just edit the twenty questions using it and delete the current misspelled tag and add the correctly spelled tag.
(That wouldn't work with regular plurals or hyphenated vs non-hyphenated, but works in all other cases.)
The drawback is that it has a tag wiki and those have histories of who made what edit to them at what time. Copying the current tag wiki over will erase that history and credit you as the sole tag editor.
Worse is that there are badges awarded to creators of tags when they get enough use. You would also become the new creator of the tag and the old creator will never be able to get those badges.
So I'm hoping there's a less damaging way to do it and you can accept that as the answer and not this one! (-: