Ask HN: How do you convince a company to transition away from its own jargons?

Like many start-ups, the company that I work with has developed its own definitions and terminologies that are unintelligible to outsiders. I experienced this before and found it very hard even when there were business/financial/legal implications (e.g. calling something a safety device when it wasn't).

For people who have been with the company for a very long time, everything is very consistent and it all makes sense which it sort of does once the whole history is explained. However, this makes poor UI/UX and quite confusing to everyone else, including customers.

Wondering if anyone has experience dealing with this and how they approached adopting more standardized nomenclature consistent with the product industry that they're in?