Growing up in Oklahoma I didn't use the word "ya'll" but my brother did. Some people do some people don't.

I've lived in Oklahoma before and people from there don't really say Ya'll.

Haha, I'm from Oklahoma too and I say "do what?" all the time. Glad to know it's not just me. Don't say "y'all" at all but I hear it from family and friends or random people when out and about.
A nozh scrap any time you say.

While I thought Cumberbatch did a fine job with an American accent, he still looks so English. Aside from that I was surprised not one actor said "Do what? " which is another Oklahoma expression meaning "what was that?" Or "what did you say?" But I grew up and still live in OK, Some people in the state have much stronger accents, southern twang, or redneck sound. That being said I still don't feel that this movie has anything in common with Oklahoma other than it's location. This family drama could have been set in ANY state and doesn't represent Oklahoma to me.

I'm from Oklahoma, and I hear people saying "y'all" all the time.
And Tracy Letts, who is male, is from Oklahoma as well.
Pay no attention to the man behind the curtain.

Know many, many people, from OK. And I go visit there often. What you are saying is not true. I rarely hear people say it.

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I am watching it now. Heard Meryl say it during dinner after the funeral.

I live in Louisiana, and we say "y'all" all the time, but never when addressing just one person, only two or more. Interesting to know that it's used differently in other parts of the country.

I grew up in that very portion of Oklahoma and not only never picked up yall, I seldom heard it used by lifelong residents.

I'm from Oklahoma and never said or heard anyone ever say y'all.

Why did you think he was lousy? I thought he was quite wonderful. He played a man who was a disaster and felt horrible about himself because his mother was a shrewish biatch. When he drops the casserole and started with "I'm so sorry!" I laughed. Poor little Charles. A sweet disaster of a human being.

I agree that Cumberbatch sounded more Oklahoma than the rest.
Too bad he was lousy in that role (as usual).

It's Tracy
L
etts, and I doubt that
he
had much say in the casting. However, I thought Cumberbatch came closer to sounding like an Oklahoma native than anyone else, other than Streep.
For more discussion of Oklahoma authenticity, or lack thereof, check out the thread about all the clothes the characters are wearing, and their lack of sweat, in this 100-plus-degree summer.
Meryl Streep is a shape-shifter.