I still remember the shock I felt when I discovered that Torquemada's favourite - dastard - is a real word.
"My goodness!"/"good heavens!"/"jings!"/"crivvens!"/"generic exclamation of surprise!"Uh. I expected something more...bombastic, I guess. Or maybe more vulgar, knowing the word drokk. That's...good anyway. Well...Jovis Drokk!
I know this is all good fun but it's maybe worth reminding our new friend that there really isn't a rule for this sort of thing. It's just what the writer thinks sounds good and there's no point in trying to draw a direct parallel between current words.
On top of that, swearing is notoriously difficult to translate or do properly in another language. I'm sure we've all heard the cautionary tale of the Polish engineer who could never remember where to put his arsehole or when he needed fucking.