I had to add the line in ruleset.xml with severity 5 to get it to work. That doesn't seem right but I'm not really familiar with customizing sniffer and the "5" came from running with -vvv where the message wasn't clear but seemed like it was skipping it because it wasn't "5".
After an initial burst of enthusiasm this now seems too specific, and where do you stop. Either spellcheck against a full dictionary, which has its own problems, or don't.
Inspired by https://github.com/civicrm/civicrm-core/pull/18238 and a history in civi that goes back I think forever of repeatedly misspelling this word.
I had to add the line in ruleset.xml with severity 5 to get it to work. That doesn't seem right but I'm not really familiar with customizing sniffer and the "5" came from running with -vvv where the message wasn't clear but seemed like it was skipping it because it wasn't "5".