All data about demographic information regarding Western Sahara is extremely error prone, regardless of source. Most countries take censuses every ten years, and some every five in order to stay abreast of change and miscounts; the last count was conducted in 1970, and even that data by colonial Spain is considered unreliable due to large nomadic populations.
Following the 1975 Green March, the Moroccan state has sponsored settlement schemes enticing thousands of Moroccans to move into the Moroccan-occupied part of Western Sahara (80% of the territory). By 2015, it was estimated that Moroccan settlers made up at least two thirds of the 500,000 inhabitants.
The following demographic statistics are from the CIA World Factbook, unless otherwise indicated.
Modern Standard Arabic and Spanish, the former colonial language, are the official languages of the Polisario Front, based in Tindouf, Algeria. Hassaniya, an Arabic dialect, is the native language spoken in Western Sahara and in the refugee camps in Tindouf in Algeria. There is also a significant presence of Berber language speakers in the northern parts of the territory of Western Sahara.
Hassaniya, primarily spoken at home, is dominated by the Moroccan dialect spoken in the streets, workplace, and schools. This is because the great majority of the population consists of Moroccans who settled in Western Sahara. French is also commonly used by the Moroccan administration. In the urban areas Moroccan Arabic is now spoken, as Morocco controls and administers most of the territory of Western Sahara and all of its cities, and considers it an inseparable part of the country. The Moroccan constitution stipulates two official languages for the Kingdom of Morocco, including Western Sahara: Berber (Tamazight) and Arabic.