My daughter is bilingual, English & German, and she is sometimes bemused by the weight attached to cuss words in English. My nieces and nephews are growing up in the UK and obviously children cursing is completely taboo.
I allow my daughter to curse in English, mostly because it's hilarious. If we were bringing her up in an English-speaking country, I would allow her to use one curse word with impunity. I would choose the curse word. I think this would nip any potential prudishness in the bud and make her a more open and rounded adult.