Excerpt from change request document:

I copy from Thomas Michael Green (see reference, page 10): "Ulwa is the southernmost surviving member of the Sumu language subfamily. It is not mutually intelligible with its northern Sumu neighbor, the Mayangna language, whose modern dialects are Panamahka and Tuahka of Nicaragua (see von Houwald 1980, Norwood 1987 and 1997) and Tawahka of Honduras (Benedicto and Hale 1998)".