How did Latin language begin to change?

Latin did not evolve into English. English evolved from a Proto-Germanic language that also gave rise to German, Dutch and the Scandinavian languages, while Latin evolved into the present-day Romance languages (French, Spanish, Italian, etc.). Ultimately Latin and Proto-Germanic are from the same source (known as Proto-Indo-European), but there is no direct line of descent between Latin and English.

Nevertheless, English has a vocabulary that is largely of Latin origin for two reasons: the Norman French conquest of England, which added many French Words to the English language, and the position of Latin as the language of science, scholarship and religion in Europe through the Renaissance and into early modern times.