This is either part of, or related to, "code-switching". https://en.wikipedia.org/wiki/Code-switching . That could be the case at your FANG company, for one or multiple of the reasons given.
But yeah, most of the time, people are like “Mississippi? You don’t have any accent!”
Our natural accent is a mix of the many places our family has lived and a fair few words that have stayed with us that most people don't use. It's ours and we love it. But I don't expect other people to know that.
When on the phone or a zoom with everyone, we'll drop into the natural accent. It's especially bad when we get drunk and do so. My SO has had a time learning 'us', and we've added some of their familys' ticks too. I guess it evolves with each person that comes in.
I had a friend in college from Boston's South Side and when he was drunk and on the phone back home, he was unintelligible.
I agree with calling this 'code switching', but to me (and maybe I'm alone here) that sounds a bit, I dunno, negative. Like I'm being forced to speak in a manner that I don't want to because of money. That's not it.
I speak with my family in a way that is a bit more private. We have our own little thing that outsiders aren't a part of. It's not exclusive by any means, but we're not worried about being understood. I think my family understands that a more common form of communication is needed for the rest of the world.
Actually, you know, we do call the form of English we use at work 'Cash English'. So, I'm full of BS here, maybe.
Tangentially related, I once told a coworker that he was a hobo. He was also offended, but I suggested he do a bit of research on the etymology. He realized that he was indeed a hobo.
Wiktionary has:
> Unknown. Possibly a contraction of ho, boy or the dialectal English term hawbuck (“lout, clumsy fellow, country bumpkin”).
What did he agree to?
Also, there must be something wontedly derogatory but technically accurate they could call you for providing this education?!
Condescending?
Call someone a term, then suggest they "research the etymology", then they realize I was right to call them that. Great for me providing them education!
Technically, he's a "beachcombing barnacle" if Wikipedia's slang terms are accurate. After graduating with a mechanical engineering degree, he rode a dirt bike across the country to CA with no plan, and couch-surfed for a while on another coworker's boat at the harbor. He eventually stopped by our office on a cattle ranch in the middle of nowhere, poked around a while, then asked for a job he was woefully unqualified for. We offered him an internship based mostly on his exceptional tenacity, and he's now been with the company full time for several years.
My wife has a much more pronounced southern accent than I do, and I remember that on the occasions when she would visit the campus to have lunch with me, a lot of heads would turn to see who was speaking. I kind of doubt this was due to any negative connotation with southern accents though — I think it was just unusual to hear one there.