¿Cuál es la diferencia entre pra caralho y pra cacete/pra caraca ?Puedes dar oraciones como ejemplo.

All of them are used as intensifiers, making a statement more forceful.

✍️ For example:
— “Essa pergunta é difícil pra caraca/caralho/cacete.”
— “A vida é dura pra caraca/caralho/cacete.”

“Pra cacete” sounds pretty vulgar to me.

“Pra caralho” sounds quite vulgar, but it’s so common where I live that it’s not usually a huge deal when it’s said.

“Pra caraca” is the mildest among the three options. I believe it’s actually a euphemism for the former two expressions. It doesn’t come off as vulgar at all (at least to me).

In terms of how vulgar they sound, this is how I would compare them to English intensifiers:

⁃ Pra cacete → As fuck (pretty vulgar)
⁃ Pra caralho → As shit (quite vulgar)
⁃ Pra caraca → As hell (not vulgar at all)