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]
Foreign language influences in English The French contributed legal, military, technological, and political terminology. Their language also contributed common words, such as the names of meats: veal, mutton, beef, pork, and how food was prepared: boil, broil, fry, roast, and stew; as well as words related to the nobility: prince, duke, marquess, viscount, baron, and their feminine equivalents.[6]:254-258 Nearly 40 percent of English words (in an 80,000 word dictionary) may be of French origin.