As a mother, I often tell my girls to always consider each side of a story and to be cautious about thinking that everyone understands things as they do. This lesson could certainly be used in the service industry. In all of our businesses, internally we "talk" a language that only "we" understand. It may be acronyms, certain words that have double meanings, numbers, etc. Several of my team members can speak an entire sentence using acronyms, and I would understand, but of course, our customers would not. An acronym that we use everyday is SPT, which we call "Spit" and is a very important database/program. Telling our customers that we "will check the 'Spit' to confirm their project status" would no doubt cause confusion.
“If one does not understand a person, one tends to regard him as a fool” ― C.G. Jung