Official language - Countries designate at least one language as their official language, which is the one used by the government for laws, reports, and public objects, such as road signs, money, and stamps.
Standard language - In a language with multiple dialects, one dialect may be recognized as the standard language, which is a dialect that is well established and widely recognized as the most acceptable for government, business, education, and mass communication.
The 3 European people originally came together to form the English people and English language were the Jutes, Saxons, and the Angles. The Jutes settled primarily in southeastern England, the Saxons in the south and west, and the Angles in the north.
The 2 subsequent invasions added additional words to the evolving English language are by Vikings in the ninth century and Normans in the eleventh century.