LOL!
There's a regular segment of a TV program out of Denver in which screwy pronunciations of places in Colorado are highlighted, such as Buena Vista, which is pronounced by locals as Byoona Vista or Del Norte, which locals pronounce Del Nort.
I was once offered a position with a law office in Greenville, Mississippi. The lawyer who made the offer pronounced it Gurnvul.
In Wyoming, my favorite is Togwotee Pass, located between Dubois and Jackson Hole. It's pronounced like Towgatee. For that matter, Dubois is Dooboys, with the emphasis on the Doo and the S as in Sam, not zoo, and not the French Doobwah. Then there's Popo Agie, a river in the Wind River Mountains of Wyoming--it's pronounced Puhpowsha, not Popo Aggy.
Bringing this back to aviation, not too long ago, Fort Collins/Loveland, KFNL, was renamed Northern Colorado Regional Airport, NOCO for short. Not NORCOR or NORCO, as I've often heard on the radio. Likewise, Rocky Mountain Regional Airport is colloquially called Metro, but they'll still answer if you call Jeffco Tower--not sure if you call Rocky Mountain Tower. We old folks who used to land at Arapaho County Airport now land at Centennial, but that's why the airport identifier is KAPA.
No wonder furriners have so much trouble with Americanese!
Cary