In 1776, at the point of severance, except for an infusion of words from east coast Indian languages, the English language of North America was not in any radical way dissimilar from that of what the American settlers called the mother country.
Robert BurchfieldAt all periods of the [English] language it is difficult to assign a beginning date to most new words and meanings. They tend to slip into the language silently, and are placed in date order only when scholars subsequently get to work.
Robert BurchfieldI am sure that the two main forms of English, American English and British English, separated geographically from the beginning and severed politically since 1776, are continuing to move apart, and that existing elements of linguistic dissimilarity between them will intensify as time goes on, notwithstanding the power of the cinema, TV, Time Magazine, and other two-way gluing and fuelling devices.
Robert Burchfield