I'm writing a fantasy story where one of the characters is a pirate. I do not want to use any cuss or curse words, but I want the character to be believable or realistic.

For example, I know a pirate might say "bloody" but, knowing the history behind the word, I don't believe I can use that.

Does anyone have any (good, clean, appropriate) alternatives to cuss words? (I'm going off of the definition of cuss and curse words from this post.)