The document discusses how the English language is constantly evolving to meet the needs of its speakers. It changes gradually over time through influences like new technologies, immigration, colonization, and mistakes. Old English was transformed by the Danish invasion in the 9th century and then again by the Norman conquest in the 11th century when French became the dominant language. Over subsequent centuries, English regained prominence while absorbing vocabulary from Latin, French and other languages. The language became more simplified as it lost complex inflectional endings. The Great Vowel Shift in the 15th-17th centuries also significantly changed English pronunciation patterns.