The most powerful lies aren’t the day-to-day, so-called white lies--that we’re ”fine” or that we genuinely care if complete strangers “have a good one.” These are, in fact, sometimes important parts of being polite.
“Momentum” is a word that we don’t usually think of as having a technical origin, even though we hear it used a lot by reporters during election season. A typical use would be something like “Senator Belfry’s campaign seems to have gained momentum following his recent speech to the Bloom County Chamber of Commerce.” There seems to be nothing technical about that.
What we consider correct or proper English has long been bound up in class distinctions. Prior to the advent of public education, this was much more obvious than it is now. Proper English defined itself as the English used by proper people. “Real” English was the English of aristocrats, thus the phrase “The Queen's English,” which is still with us today.
But even in the supposedly classless or at least socially mobile U.S., we tend to attribute correctness to the social “winners”: educated, urban, northerners, preferably those from “old money.”