THE NATURE OF LANGUAGE

Explains that while animals communicate emotions through sounds or gestures, human language is unique because it requires a specific system of rules (grammar), a sound system (phonology), and a vocabulary (lexicon).

Distinguishes between language acquisition, where individuals learn a 'mother tongue' or first language within their speech community, and language learning, where people study second languages formally or informally.

Discusses how speech communities shape language rules, leading to variations like American vs. British English. It also explains 'language contact,' where interacting with speakers of other languages leads to language change and the potential development of new language forms.

A recap of how language is a complex human system that is inherently dynamic, undergoing natural change through cultural contact and interaction.