Juba Arabic (, ; ), also known since 2011 as South Sudanese Arabic, is a lingua franca spoken mainly in Equatoria Province in South Sudan, and derives its name from the South Sudanese capital, Juba. It is also spoken among communities of people from South Sudan living in towns in Sudan. The pidgin developed in the 19th century, among descendants of Sudanese soldiers, many of whom were recruited from southern Sudan. Residents of other large towns in South Sudan, notably Malakal and Wau, do not generally speak Juba Arabic, tending towards the use of Arabic closer to Sudanese Arabic, in addition to local languages. Reportedly, it is the most spoken language in South Sudan (more so than the official language English) despite government attempts to discourage its use due to its association with past Arab colonization. Classification Juba derives from a pidgin based on Sudanese Arabic. It has a vastly simplified grammar as well as the influence of local languages from the south of the country. DeCamp, writing in the mid-1970s, classifies Juba Arabic as a pidgin rather than a creole language (meaning that it is not passed on by parents to their children as a first language), though Mahmud, writing slightly later, appears to equivocate on this issue (see references below). Mahmoud's work is politically significant as it represented the first recognition by a northern Sudanese intellectual that Juba Arabic was not merely "Arabic spoken badly" but is a distinct dialect. Because of the civil war in southern Sudan from 1983, more recent research on this issue has been restricted. However, the growth in the size of Juba town since the beginning of the civil war, its relative isolation from much of its hinterland during this time, together with the relative collapse of state-run education systems in the government held garrison town (that would have further encouraged the use of Arabic as opposed to Juba Arabic), may have changed patterns of usage and transmission of Juba Arabic since the time of the last available research. Further research is required to determine the extent to which Juba Arabic may now be considered a creole rather than a pidgin language. Phonology Vowels Each vowel in Juba Arabic comes in more open/more close pairs. It is more open in two environments: stressed syllables preceding , and unstressed syllables. For example, contrast the in "piastre", and "salt"; or the in "lesson", and "milk".