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| Country | Official Language(s) | Native Name | Other Languages Spoken |
| Argentina | Spanish (96%) | Argentina | Quechua (mostly Southern Bolivian dialect) (3%) |
| Bolivia | Spanish (41%) | Bolivia | Quechua (Northern and Southern Bolivian dialects) (39%), Aymara (24%), German (2%) |
| Brazil | Portuguese (99%) | Brasil | |
| Chile | Spanish (97%) | Chile | Mapudungun (Auraucano) (3%) |
| Colombia | Spanish (97%) | Colombia | |
| Ecuador | Spanish (77%) | Ecuador | Quichua (Chimborazo dialect) (10%), Quichua (Imbabura or Otavalo dialect) (3%) |
| French Guiana | French (n/a) | Guyane Française | The French-based Guianese Creole is the most widely spoken language. No percentages available. |
| Guyana | English (n/a) | Guyana | Guyanese Creole (English-based) (86%), Wapishana (1%), Caribbean Hindi (n/a) |
| Paraguay | Spanish (25%) | Paraguay | Guaraní (95%), German (3%) |
| Peru | Spanish (80%) | Perú | Many dialects of Quechua, including: Cuzco (6%), Ayacucho (4%), Ancash (3%); Other languages: Aymara (1%) |
| Surinam | Dutch (>1%) | Suriname | Caribbean Hindi (38%), Sranan (30%), Caribbean Javanese (15%), Guyanese Creole (English-based) (15%), Saramaccan (5%), Aukaans (Ndjunká) (3%), Hakka (Chinese) (1%) |
| Uruguay | Spanish (92%) | Uruguay | |
| Venezuela | Spanish (97%) | Venezuela | Wayuu (Guajiro) (1%) |
