Language ratings:
Not only does no one swear, even the bad guys never insult anyone.
No swearing at all. A few insults is the worst of it.
The worst word you'll hear is "butt" though there may be a few things along the lines of "by the gods!"
A few mild words, and plenty of the "Holy Hera!" or "by the first egg!" sort.
The bad guys will swear a lot, and good guys do it in extrmemity. Sensitive readers will proably not like it, and I won't put these here uless they are otherwise supuerb.
Every other word seems to be profanity. This sort of book won't be featured here.