Barbecue from Spanish via Haiti (framework of sticks). Slogan from Gaelic. Serendipity is a made up word using ancient name for Sri Lanka! Orange from Arabic via French.

Majority of 100 most commonly used English words from Anglo Saxon Old English. But tens of thousands from French, besides Latin already being used in 1066 by scholars and clergy.

Bloody, used in a London play caused a scandal in 1914, similarly “fuck” on TV in 1965.

Shibboleth is a custom or tradition especially related to speech that differentiates one group from another.  Comes from Old Testament (means just stream in flood). Key is how “sh-” is pronounced! Bit like rhoticity – haitch vs aitch for letter H, used to differentiate Catholics and Protestants during Troubles!