English is a West Germanic language originating from the Anglo-Frisian dialects brought to Britain by Germanic invaders from various areas of what is now northwest Germany, southern Denmark and northern Netherlands.
Initially, Old English was a group of several dialects, reflecting the varied origins of the Anglo-Saxon kingdoms of England. One of these dialects, late West Saxon, at one point came to dominate. The original Old English was then influenced by two waves of invaders, one of speakers of the Scandinavian branch of the Germanic languages, who conquered and colonized parts of Britain in the 8th and 9th centuries; the other was the Normans in the 11th century, who spoke Norman French.
The Norman occupation grafted a more elaborate layer of words from the Romance languages derived from Latin. With the Renaissance, Latin and classical Greek supplanted Norman French as the main source of new words.
With colonialism and technological innovations, the rate of new words entering the language has accelerated enormously, so much so that today we have different varieties of English in the various countries where it is spoken