I'll have to admit, Tbone, that I was puzzled by this post. I don't remember any vulgar language in The Shootist. Maybe I'm desensitized by the cussing in so many movies of today that I don't notice it in older films. I'll have to watch The Shootist again to see what you mean.
I know that he addressed the use of profanity in his Playboy interview when asked:
Quote
Playboy: Audiences may like your kind of violence on the screen, but they'd never heard profanity in a John Wayne movie until "True Grit". Why did you finally decide to use such earthly language in a film?
Wayne: In my other pictures, we've had an explosion or something go off when a bad word was said. This time we didn't. It's profanity, all right, but I doubt if there's anybody in the United States who hasn't heard the expression son of a bitch or bastard. We felt it was acceptable in this instance, At the emotional high point in that particular picture, I felt it was ok to use it. It would have been pretty hard to say, "you illegitimate sons of so-and-so! "
So, I guess he may have felt that it was appropriate for the scenes in The Shootist. I've never read anywhere about him having an issue with it. He just disagreed on how the movie should end and they rewrote it to end in a way that pleased Duke.
Mark