Portuguese language in Africa Angola, Mozambique, and Guinea-Bissau with autochthonous African languages (mainly Niger–Congo family languages). In Africa, the Portuguese language experiences pressure and possibly competition from French and English. Cape Verde, Guinea-Bissau and São Tomé and Príncipe are all members of La Francophonie and Mozambique is a member of the Commonwealth of Nations and has observer status at La Francophonie. Conversely, Equatorial Guinea has announced its decision to introduce Portuguese as its third official language, in addition to Spanish and French, and has made a request for membership in the CPLP. Mauritius and Senegal have also joined the CPLP as associate observer members.
Portuguese dialects dialects of Brazil, Africa, and Asia derived mostly from those of central and southern Portugal. In the Portuguese town of Barrancos (in the border between Extremadura, Andalucia and Portugal), a dialect of Portuguese heavily influenced by Southern Spanish dialects is spoken, known as "barranquenho". Brazilian dialects are divided into northern and southern groups, the northern dialects tending to slightly more open pre-stressed vowels. The economic and cultural dominance of São Paulo and Rio de Janeiro in Brazil made their dialects end up having some influence on the rest of the country. However, migration from the Northern states to the Southern