Western Nilotic language groups in Uganda include the Acholi, Langi, Alur, and several smaller ethnic groups. Together they comprise roughly 15 percent of the population. Most Western Nilotic languages in Uganda are classified as Lwo, closely related to the language of the Luo society in Kenya. The two largest ethnic groups, the Acholi and Langi, speak almost identical languages, which vary slightly in pronunciation, suggesting that the two groups divided as recently as the early or mid-nineteenth century. The Alur, who live west of the Acholi and Langi, are culturally similar to neighboring societies of the West Nile region, where most people speak Central Sudanic languages.

Data as of December 1990