"Keša'i owes its survival to its virtual seclusion in the upper end of the mountainous valley to which it belongs, which lay away from the communication routes for many centuries. The communicational isolation, however, has been breached in modern times through introduction of modern education and mass media and, more recently, by construction of roads and massive real estate developments. These effects as well as massive migration of the villagers to urban centers have led to a gradual language shift and marked decrease in speakers of Keša'i."