Bolivia: Spanish (official), Quechua (official), Aymara (official)

Brazil: Portuguese (official), Spanish, English, French

Chile: Spanish

Colombia: Spanish

Ecuador: Spanish (official), Amerindian languages (especially Quechua)

Falkland Islands: English

Paraguay: Spanish (official), Guarani (official)

Peru: Spanish (official), Quechua (official), Aymara, and a large number of minor Amazonian languages

Uruguay: Spanish, Portunol, or Brazilero (Portuguese-Spanish mix on the Brazilian frontier)

Venezuela: Spanish (official), numerous indigenous dialects
 

Guianas:
French Guiana: French

Guyana: English, Amerindian dialects, Creole, Hindi, Urdu

Suriname: Dutch (official), English (widely spoken), Sranang Tongo (Surinamese, sometimes called Taki-Taki, is native language of Creoles and much of the younger population and is lingua franca among others), Hindustani (a dialect of Hindi), Javanese