My 3 favorite experiences with language as an American:

(1) My Jamaican coworker who I couldn't understand for the life of me and my Ukrainian coworker who my Jamaican couldn't understand at all, the Ukrainian coworker understood the Jamaican coworker just fine though and I understood my Ukrainian coworker just fine. Basically it turns into a fun game of telephone whenever we need to talk.

(2) My former coworker from Haiti who no one but the hiring manager and I could understand, the best part about this is that I didn't know he had an accent. I just didn't hear it somehow. He was a great guy, he went back home a few years ago when his mother passed. Got stuck due to the pandemic and never came back to the company. I hope he's doing well.

(3) My former coworker from Guatemala insisting English wasn't my first language as to him it sounded like English was my second language at best. I've been working on it since then. I still suck at it.