"But when talking to the wider world I must use terms that THEY understand. This is not misusing a word, it is choosing language that your interlocutor will understand. It's called communication."
If you are using the term incorrectly, for whatever reason, you are peddling misinformation.
I repeat, no matter how many times people refer to geneology it will continue to be wrong and by accepting it you are being patronising.
Going through your list (some of which I am familiar with, most I am not) what is the common feature which makes them 'folk'.
Jim Carroll