There are, of course, in English, two basic types of cussing. One is the Second Commandment violation type, which I don't want to get in to here for several reasons. The other would be use of vulgar words for various bodily processes. I would suggest that that type of cussing is avoided to the extent that the word choice does not suggest the proscribed word(s). Therefore, piffle or tommyrot would be acceptable, but horse-puckey would be borderline, and bullshimmy would be over the line.