Where does “King's English” come from?

King's English (English) comes from English English, from French French, from English French, from Middle English French, from Old English Frenċisċ, from Old English Franca, from Proto-West Germanic frankō, from Proto-Germanic frankô — pole, stalk.

King's English (English): Often preceded by the: spoken or written English regarded as used and safeguarded by the King of England; standard English characterized by correct grammar and what is thought of as proper usage of words and expressions, and (when spoken) formal British pronunciation

Definitions

  1. Often preceded by the: spoken or written English regarded as used and safeguarded by the King of England; standard English characterized by correct grammar and what is thought of as proper usage of words and expressions, and (when spoken) formal British pronunciation

Ancestry of “King's English”, step by step

King's English traces back through two separate lines of ancestry.

via English English

StepLanguageWordMeaning
1EnglishEnglishOf or pertaining to England; English-language; of...
2FrenchFrench
3EnglishFrenchThe people of France; groups of French people;...
4Middle EnglishFrench
5Old EnglishFrenċisċFrankish
6Old EnglishFrancaFrank, Frenchman; a Frank
7Proto-West Germanicfrankōspear, javelin; a Frank
8Proto-Germanicfrankôspear, javelin; a Frank
9Proto-Indo-EuropeanprAng-pole, stalk

via English King

StepLanguageWordMeaning
1EnglishKingradiotelephony clear-code word for the letter K
2Middle Englishkingking monarch
3Old Englishcyningking
4Old Englishtūnenclosure, yard; place; dwelling
5Proto-West Germanictūnfence
6Proto-Germanictūnąfence; enclosure
7Gaulishdunumfort; hill, hillfort
8Proto-Celticdūnomstronghold, rampart
9Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European prAng-