Why do people increasingly find Shakespeare challenging to read? Why do we translate Beowulf? How did Latin become Spanish, Italian, French, and other languages? Languages change over time. They are affected by internal and external factors. Many of these changes are recorded, and some fairly well understood. In this module we will explore the variety of changes that occur to languages over time, including sounds, word structure and order, and semantics, as well as language spread and language death. This module can be taken by itself or as part of a larger Introductory Linguistics sequence of modules.