This article explores the unique linguistic features of early Egyptian, arguing that these characteristics are best explained by a period of intense and unusual linguistic contact in the prehistory of the language. Drawing on both linguistic and archaeological data, the study examines the socio-historical context of these contacts, linking them to the spread of pastoralism and the desertification of the Sahara during the 4th millennium BCE, and the unification of Egypt at the end of that period.
Kilani et al. (Wed,) studied this question.