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 Cross Country Championships race. Carlos Lopes is the most successful athlete of the competition, having won ten national titles between 1970 and 1984, while Rosa Mota is the most successful woman, with eight titles between 1975 and 1985. In the short races, Rui Silva has the most titles at nine (between 2000 and 2013) and Anália Rosa has the most among women, earning five titles from 2000 to 2006. The following year's races were won by non-Portuguese runners: Portuguese Cross Country Championships The Portuguese Cross Country Championships () is an annual cross country running competition that serves as Portugal's national championship for the