Random antiquity
Old TV and radio shows often featured an 'intellectual bum' character who spoke precise antique English when he wasn't too drunk to say anything at all. I've never met any examples of this type. The 'outlaw intellectual' was common in Okla, and I probably fit the template ... but none of us talked like King James.
I wonder if anyone still speaks antique English in public and gets away with it? Not just in semi-private contexts like blog posts and sermons, but in business meetings and restaurants?
"Now, Robert, prithee vouchsafe unto us thy meditations upon the KerMac SuperCenter account, if thou wilt."
For many years Quakers had their own peculiar pronouns, which sounded antique but weren't proper grammar of any era. I'm pretty sure they gave up the practice.