Does bloody not count as a swear?
Also : bugger!
Maybe it only counts if he’s sober.
Maybe when he’s drunk he swears a blue streak, but only Crowley knows, so he’s got plausible deniability.
“Get out of the road, you stupid sack of–”
“Language, Crowley!”
“Sorry, Aziraphale.”
“You know I prefer not to hear that kind of talk.”
“Of course I do, Aziraphale.”
“And it doesn’t behoove you to act in such a base way.”
“I am a demon, Aziraphale…”
“Yes, but really. Show some class. I’m sure you can handle a simple matter of road navigation without cursing in that way. Do you know, I haven’t said a foul word in over four thousand years.”
“Is that so, Aziraphale…”
“Indeed. And if I can do it, my dear boy, you can do it.”
“Mmm. Tell me again, Aziraphale, what you said last night when you knocked your wine all over that awfully lovely first edition of The Happy Prince?”
“…”
“Mmm-hmm. Right.”