Regardless of the character's name, I thought actor Barton Heyman did a great job as Segundo. He's unrecognizable (in terms of appearance, demeanor, and speech) compared to his usual Caucasian roles. Of course, why not just hirer an actual Mexican.

I guess you guys are right about the heavy H. And Don..yeah I saw the Newman too.

Yea,that about sums it up. I've seen this movie a dozen times and you would swear he's asking for "400" dollars the first time he requests the amount for the widower. Like you said it's his crappy mexican acent, although if you want to see another one, catch Paul Newman in "The Outrage"

Just watched it again tonight, had to rewind that scene a couple a times just to check. Lancaster says El Segundo, but with his crappy Mexican accent he's really punching his H's at the beginning of sentences. He does it through the whole movie.
"We all got it coming kid."

Yeah, Segundo means second and has been used to refer to a bosses right hand man, but I've just watched again and I know he says Herr
Its just one of those things in life that's gonna bug me forever.

I'm sure he means Tanner's no 1 henchman but yesit is vague