 Quick inspection of the vocabulary shows that Sisumbwa appears to be closer to Nyamwezi than to any other language in the group (Nurse and Philippson 1980).In terms of contacts, Sisumbwa speakers say that for a long time they have been in contact with speakers of Kisubi (Biharamulo), Kirongo and Kizinza (Geita and Sengerema) and Kiha (Biharamulo and Bukombe/Kahama), in addition to Kinyamwezi and Kisukuma.The language is mainly spoken in Bukombe, Mbogwe and Geita districts (Geita Region); Kahama district (Shinyanga Region); Biharamulo district (Kagera Region) and Urambo district (Uyowa) – Tabora Region.