English from about 1100 to 1450 WordNet 3.0 & Open English WordNet

Middle English is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. Wikipedia

Stage of the English language from mid-12th century to around the turn of the 16th century Wikipedia Disambiguation

Stage of the English language from about the 12th through 15th centuries Wikidata

The ancient or older language of Modern English, spoken in England and parts of Scotland (where it became Lowland Scots) from about 1100 AD to 1500 AD. It developed from Anglo-Saxon, also called Old English, with heavy influence from French and Latin after the Norman invasion. Wiktionary

Middle English. Wiktionary (translation)