Influence of Norman French: After the conquest, French became the language of the ruling class and of officialdom, resulting in a substantial influx of French vocabulary into the English lexicon.
Loss of Inflections: Over time, the inflectional system of Old English simplified, leading to a more fixed word order that characterizes Middle English.
Modern Relevance of Old English
Today, Old English serves as an essential foundation for understanding the English language and its development over time. Its study is pertinent for several reasons.