Umbundu (umb-umb) = 3 (Wider communication). Trade language, particularly for slave and ivory trade, between Ovimbundu people and Portuguese settlers in 1700’s. Beginning in 1874 used as church language with arrival of catholic missionaries. Spoken by one-third of the population of Angola.
Glottolog
[umb] at ISO 639-3
[umb] at OLAC
[umb] at Odin
Wikipedia
PHOIBLE
UMbundu at WALS
Wikidata