Although, most of Black Dominicans are descendants of slaves imported to the country and who speak Spanish, there are also two Afro-communities that have English as their mother tongue: Samaná Americans and Cocolos. Samaná Americans from the Samaná Peninsula, are descendants, of freed slaves from the United States, who entered the country in 1824 when it was under Haitian rule, because of the favorable pro-African immigration policy of Haitian president Jean-Pierre Boyer, constitute the most sizable group of native English speakers in the Dominican Republic. Aware of its distinctive heritage, the community, whose singular culture distinguishes them from the rest of Dominicans, refers to itself as Samaná Americans, and is referred to by fellow Dominicans as "los americanos de Samaná". Another Afro-group is the called Cocolo, descendants of those who came to the island from the English-speaking islands in the eastern Caribbean to work in the sugar plantations in the eastern part of the island between the late nineteenth and early twentieth century, they have formed communities in San Pedro de Macorís and La Romana. Its largest population of Afro-people are of Haitian origin, which is also the largest immigrant community in the country and is numbered according to some estimates, to be more than 800,000 people.