As someone whose had the priviledge working both in a call centre & retail for several years… you’re wrong.
Most is local colloquialisms, where regions sometimes substitute words or phrases for others.
And then there’s the “native English speakers” that are straight up idiots, and butchering the language constantly…
The amount of South Londoners that say “arced” instead of “asked” is too damn high.
That’s my secret, I always sign off my emails as “Regards”.