Final answer:
The key individuals in 'English: A Living Language' are William Caxton and William the Conqueror.
Step-by-step explanation:
English: A Living Language is a textbook written by William Caxton and William the Conqueror.
William Caxton is known as the first English printer who introduced the printing press in England. He played a crucial role in the development of the English language.
William the Conqueror, also known as William I of England, was the Norman king who successfully invaded England in 1066. His reign had a significant impact on the English language and influenced its development.
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