Book excerpt: South America has a diverse linguistic heritage. Thousands of dialects and languages have been catalogued in this region, including all those that arose since the European invasion. The Arawakan language family, Macro-Ge and Carib, Chibchan, the Tupi-Guarani language family, Tucanoan, Quechuan and Panoan are some of the major language families in South America. The most widely spoken languages in South America include Portuguese, Guarani, Spanish, English, Quechua, and Aymara. South American languages are extremely diverse in terms of vocabulary, phonology, and grammar. The Guarani language is a member of the Tupi-Guarani language family and is spoken in multiple countries of South America such as Paraguay, Argentina, Bolivia, and Brazil. It is classified as a polysynthetic language and its morphology majorly uses agglutination. This book is compiled in such a manner, that it will provide in-depth knowledge about the phonology, morphosyntax, and semantics of South American languages. It will provide comprehensive knowledge to the readers.