Old English definition
The English language from the fifth century until about 1150. In the fifth century, the Angles and Saxons of Germany settled in Britain and established their language in the southern part of the island — the region that was called “Angle-land,” or “England.” After 1150, the Norman French language introduced after the Norman Conquest influenced Old English, and Middle English developed.
Note: Old English resembles the language spoken in Germany in the same period and is impossible for a present-day user of English to read without training. Beowulf is written in Old English.