Officialese

These were men, the chronicler continued, who ‘spoke pleasantly’, in the smooth officialese that most of Henry's counsellors were accustomed to deploy […]

But while using officialese might give your writing the outward appearance of being thorough and correct, that doesn't mean there's anything happening underneath. Officialese is a kind of defense mechanism. It's rooted in the fear of getting something wrong, or leaving something out, or looking stupid.