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All languages change, just as other aspects of human society are constantly changing. This is an introduction to the concepts and techniques of diachronic linguistics, the study of language change over time. It covers all major areas of historical linguistics, presenting concepts in a concise manner. While examples are given from a wide range of languages, most major concepts and techniques are illustrated by material drawn from the languages of Australia and the Pacific. This edition has been substantially revised and rewritten. Further exercises have been added for student use, and there are new sections on language planning and language contact.
Blust et al. (Sun,) studied this question.