If you are marketing in Oklahoma you want to sound as though you are from Oklahoma.
Oklahoma
Read this, y'all: Is the Okie dialect disappearing?
https://www.oklahoman.com/article/5420122/read-this-yall-is-the-okie-dialect-disappearing
OKLAHOMA SPEECH PATTERNS
https://www.okhistory.org/publications/enc/entry.php?entry=SP008