The population is composed primarily of ethnic Swazis. The prevalent language is Swazi ("siSwati" in native form). The Swazis established their kingdom in the mid-18th century under the leadership of Ngwane III. The country and the Swazi take their names from Mswati II, the 19th-century king under whose rule Swazi territory was expanded and unified; the present boundaries were drawn up in 1881 in the midst of the Scramble for Africa. After the Second Boer War, the kingdom, under the name of Swaziland, was a British protectorate from 1903 until it regained its independence on 6 September 1968. In April 2018, the official name was changed from "Kingdom of Swaziland" to "Kingdom of Eswatini", mirroring the name commonly used in Swazi.