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.
South West Africa of Justice, which in 1950 ruled that South Africa was not obliged to convert South West Africa into a UN trust territory, but was still bound by the League of Nations Mandate with the United Nations General Assembly assuming the supervisory role. The ICJ also clarified that the General Assembly was empowered to receive petitions from the inhabitants of South West Africa and to call for reports from the mandatory nation, South Africa. The General Assembly constituted the Committee on South West Africa to perform the supervisory functions. In another Advisory Opinion issued in 1955, the Court further ruled that