pardon my French

From the use of French to mean “vulgar language”, ostensibly because the words used are not in English.

• "That computer is a worthless piece of shit, if you’ll pardon my French."
• "'Have you been in England long?' / 'A damned sight too long—if you'll pardon my French,' she answered."
• "Pardon my French, but Cameron is so tight that if you stuck a lump of coal up his ass, in two weeks you'd have a diamond."
• "Look, now it's the dolly, not Parton / But pardon my French / Give no fucks about no nigga / Give no fucks about no bitch"

• excuse my français
• excuse my French
• forgive my French
• pardon mon français
• pardon my français
• pardonnez mon français
• pardonnez my French

• not to put too fine a point on it
• swear