Some important definitions

Diachronic: Of or concerned with phenomena, such as linguistic features, as they change through time.

Synchronic: Of or relating to the study of phenomena, such as linguistic features, or of events of a particular time, without reference to their historical context.

Layperson: A person who do not say the truth.

Shibboleth: an old idea, custom, or principle that you think is no longer important or suitable for modern times. It gives you a way to know where somebody is from.

Demise: death or decease.

Haggis: National dish from Scotland.

Union Jack: British flag.

WASP: An acronym for “white Anglo-Saxon Protestant” — a member of what many consider to be the most privileged and influential group in American society.