Language is important. Every field of interest develops its own detailed language in order to communicate minute details with specificity. Medicine, physics, art, theology, psychology &c all have their own jargon which is necessary to communicate properly.
Vernacular language often limited, confusing or have regional meanings. Consciousness has vernacular meanings, a theological meaning, a psychological meaning and a medical meaning inter alia.
This causes problems in interdisciplinary conversations, but sorting it out is usually a profitable venture.