I once translated audio for an ambassador, during which he began to chuckle and I immediately realised that I had switched two words causing a drastic shift in meaning.
Once I started having business meetings in the Gulf, I began pronouncing city names the way they do it. Dubai = Du-bae, Abu Dhabi = Abu Thabi. Then I started automatically switching it depending on where I was, had no idea I was doing it.
Until I played one of the Carmen games from 1995 with Lynn Thigpen, and I found a note left behind from one of her agents, I didn't realize that Carmen pays her people too Lol