20260923-0 Sumo-Mayangna 2010-01-01 2025-05-05 true 1950-05-09 SUM 2012-06-27 2011-10-06 Sumo-Mayangna sum sum Ulwa is the southernmost surviving member of the Sumu language subfamily. It is not mutually intelligible with its northern Sumu neighbor, the Mayangna language. Thus, Sumo-Mayangna [sum] split into Mayangna [yan] and Ulwa [ulw]. SUM true SUM 1950-05-09 SUM This code is deprecated in ISO 639-3. It is no longer in active use, but still has the meaning assigned to it when it was established in the Standard. 2010-01-18 2010-01-18