Whenever l have run into snooty Quebequois that insist that I speak French, I channel Peggy and say "Jay parlay fran-says tray bee-en. Jay-tude on lay-cole quart ons."
That does the trick and they will beg me to speak English.
Karens are different imo. Peggy would never call the cops on a black person, or present some distorted/dishonest version of events to a store manager/911. Shes just a narcissist. I could see an B plot of her getting pulled into a Karen's orbit though.
Kahn I could definitely see doing some straight up Karen shit.