where did the saying pardon my french come from
Pardon my French At least one source[3] suggests that the phrase "derives from a literal usage of the exclamation. In the 19th century, when English people used French expressions in conversation they often apologized for it - presumably because many of their listeners (then as now) wouldn't be familiar with the language". The definition cites an example from The Lady's Magazine, 1830:[4]
Speak of the devil Deriving from the Middle Ages, this proverb (which was, and to a certain extent still is, rendered as "Talk of the Devil...") was a superstitious prohibition against speaking directly of the Devil or of evil in general, which was considered to incite that party to appear, generally with unfortunate consequences. Its first printed usage in modern English can be found in Giovanni Torriano's Piazza Universale (1666), as "The English say, Talk of the Devil, and he's presently at your elbow."