Using any kind of language any harder than "gosh" and "darn" is tricky, too.
Heh...my bother suggested I just write everything using gosh and darn, and then put a disclaimer at the beginning telling readers to use their imagination as to what was *really* said.
Heh, I grew up learning all kinds of creative alternatives; gol darnit; dad blamit; gosh darnit;, and my all time favorite, DANG!