"When the users or domain experts use vocabulary that is nowhere in the design, that is a warning sign." #readingToday

This is not the old "nouns are objects" notion. Hearing a new word produces a lead, which you follow up with conversation and knowledge crunching, with the goal of carving out a clean, useful concept. When the users or domain experts use vocabulary that is nowhere in the design, that is a warning sign. It is a doubly strong warning when both the developers and the domain experts are using terms that are not in the design. Or perhaps it is better to look at it as an opportunity. The UBIQUITOUS LANGUAGE is made up of the vocabulary that pervades speech, documents, model diagrams, and even code. If a term is absent from the design, it is an opportunity to improve the model and design by including it.

Domain-Driven Design, Eric Evans