This may not be the correct forum for the question, so I apologize if I'm merely cluttering the place up.
Though I am far from fluent in French, I have spent enough time staying with family in Paris and Provence, as well as working and traveling alongside an actual Frenchman, to appreciate just how brilliantly obscene and insulting the classic language can sound when harnessed by a native speaker. But the individual expletives and various patterns of vulgarity in French, despite the capacity to be delivered dripping with disgust and insult so thick it's nearly tangible, lack the punch and absoluteness of well-formed vulgarities and verbal assaults in English.
Spend 30 seconds within earshot of an Irishman and you'll experience how beautifully dynamic and frighteningly confusing a barrage of f-bombs can sound with a handful of regular words tossed in. Only the Irish have made such impressive advancements in swearing, if I am not mistaken. Awesome though it may be, the melodies and smiling rhythms of everyday Irish conversation lack the hard angles and blunt totality of the all-American "fuck you" striking its victim like a linguistic punch to the ear.
I suspect my experience with non-English swearing is embarrassingly limited and I hope we are about to learn some incredible trivia about the art of R-rated language around the world. Until then I remain convinced the most effective and dynamic swears are spoken in English.