But since that’s not always possible, there has to be a way to say “more than one faux pas”—it has to have a plural. Since faux pas is a French phrase, let’s see how the French pluralize it. We know that faux pas, the singular form, is pronounced [foh pah]. The plural ...
"breach of good manners, any act that compromises one's reputation," 1670s, French,… See origin and meaning of faux pas.