Portuguese language in Africa more recent migrations of refugees (some of whom speak Portuguese) to neighbouring countries such as Democratic Republic of Congo, Namibia, Zambia and South Africa. Other migrations involved returning Afro-Brazilian ex-slaves to places such as Nigeria, Benin, Togo, Angola and Mozambique. There are also some returning white Portuguese African refugees and their descendants from Brazil, Portugal, and South Africa to their former African controlled territories, mostly to Angola (up to 500,000) and Mozambique (350,000), and most importantly, there is the arrival of Portuguese post-colonial expatriates in Angola in the recent years, because of Portugal's economic interests and the Angolan economic boom.
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