Which parent language is English believed to descend from?

English and most other European languages have descended from a common source: the Indo-European parent language.
   English was first spoken by the Anglo-Saxons who invaded England in the fifth century. They passed onto us the basic vocabulary of English, such as "me, you, sheep, and wood". Then the Vikings came into the land, bringing their own language into English. Some words like "sky, and skirt" are from Norse. Later in 55 B. C. , Julius Ceasar invaded Britain. Norman French found its way into the English language, making up the part spoken by the nobleman. The words like "royal, and government" were often spoken by the upper class. In over 15 centuries of development, English has borrowed from other languages massively, including Spain , whose language like "angel, and disciple" is often used in churches in Britain, and also Creek, and even Chinese and Japanese. It’s said there are over one million words in the English dictionary.
   As settlers established the United States as an independent nation, a new variety was added to the English language: American English. Though some people worry that the language may run out of control, many native speakers of English disapprove of building the fence around their language. They take pride in both the tolerance of invading of other languages and the tolerance of changing their language.