 While recognising the existence of important gaps in our knowledge (which may or may not ever be filled, as the last native speakers pass on), we do know of two well-defined dialect areas, at least as far as the department of Sonsonate is concerned, which may tentatively be called Upland and Lowland.The Upland dialect area includes the towns of Izalco and Nahuizalco, the Lowland area those of Santo Domingo de Guzmán and Cuisnahuat.Present knowledge also includes some points of differentiation between Santo Domingo and Cuisnahuat.