Escarpment Dogon

While Toro So was chosen as the official standard, because it has the most in common with the largest number of Dogon languages due to its central location, and is used in educational and official contexts, Jamsay Dogon is the prestige variety and is the variety used for radio broadcasts.

"Despite the fact that Tommo So and Dogulu Dom are both spoken in the central area of Dogon country, the preliminary results of our current fieldwork suggest that Tommo So bears a closer relation to Najamba or Donno So.

"[4] Tommo sɔ is thought to be spoken on the plateau between Douentza and Bandiagara by an estimated 40,000–60,000 people.

[5] In terms of neighboring languages, Tommo so is bordered by Najamba-Kidinge to the northwest, by Nanga and Jamsay to the east, by Tiranige Diga to the west, and by Donno So and Dogulu Dom to the south.

Donno So, based on fieldwork data, resembles an intermediate step between Tommo So and Toro So.