I guess I kind of gave it all away by posting that link. But here’s the standoff speech with translation:
It starts with Doc saying, “Yep. I’m sure of it. I hate him.”
Wyatt, trying to prevent a fight, then says, “He’s drunk.”
To which Doc replies, “In vino veritas.” (”In wine is truth.”)
Johnny says, “Age quod agis.” (”Do what you do.” A clear challenge to throw down.)
Doc replies, “Credat Judaeus Apella, non ego.” (”Let Apella believe the Jew, not me.”) He was quoting from Horace’s Satires and he was using the quote to assert that he was not intimidated by Ringo’s reputation and while everyone else may believe that Johnny was the fastest gun in the west - god of the gunslingers - Doc wasn’t buyin’ it. (“Look, darlin’, it’s Johnny Ringo. Deadliest pistoleer since Wild Bill, they say.”)
Johnny then says, “Inventus stultorum magister.” (”Youth is the teacher of fools.” He was saying that Doc was too old and sick to play the game with him and he was about to teach him a lesson. You might note that the conversation began with Johnny asking Doc, “You retired, too?” Doc replied, “Not me. I’m in my prime.” and Johnny replied, “Yeah. You look it.”)
Doc then says, “In pace recquiescat.” (”May he rest in peace.” He was literally saying, if you think you got somethin’ for me, bring it. One of us will be dead when it’s over and I don’t care whom. Do you?)
Doc and Johnny were both miserable people that longed for death. That’s a common trait of any good gunfighter in history - they wanted to die so nothing ever made them nervous. It’s the purest irony that a desire to die makes it difficult to get beat in a gunfight.
It’s also why, towards the end of the movie, just before Doc dies, he looks down at his toes and says, “Now that’s funny.” He always expected to “die with his boots on.”
Now you have bonus information and a free answer to one of the questions on the Tombstone Purity Test.
Back to the movie… Doc then says to Kate, “That’s latin, darlin’. Evidently, Ringo’s an educated man. Now I really hate him.”
The really scary part is that I typed all of this from memory. Sick, ain’t it?
You get bonus points if you know what Virgil meant when he said, “Her maiden name is Sullivan.” Waterboy? Anyone? Bueller? Bueller?