Roncalli, when nuncio in Paris, said to a swearing carpenter, 'Alors, qu'est-ce que c'est ça? Vous ne pouvez pas dire 'merde' comme tout le monde?  Roncalli did became pope and then a canonized saint.   
Even another saint used fecal language when giving us the word of God, [Luke 13:8, Douay-Rheims Bible] "But he answering, said to him: Lord, let it alone this year also, until I dig about it, and dung it."