Why are many written forms of Nilo-Saharan languages based on the Latin alphabet?

Many written forms of Nilo-Saharan languages utilize the Latin alphabet primarily because European missionaries were instrumental in developing orthographies for these languages, particularly from the 19th century onward.1

While some Nilo-Saharan languages have historically been written in other scripts—such as the Arabic script or, in the case of Old Nubian, a system derived from the Greek alphabet—the widespread adoption of the Latin script is a result of the historical influence of these missionary efforts. In modern contexts, this trend is often reinforced by the integration of these languages into national educational systems alongside official European languages like English and French.1