Sumo (also known as
Sumu) is the collective name for a group of
Misumalpan languages spoken in
Nicaragua and
Honduras. Hale & Salamanca (2001) classify the Sumu languages into a northern Mayangna, composed of the Twahka and Panamahka dialects, and southern Ulwa. Sumu specialist
Ken Hale considers the differences between Ulwa and Mayangna in both vocabulary and morphology to be so considerable that he prefers to speak of Ulwa as a language distinct from the northern Sumu varieties.