Wikipedia
Rwanda-Rundi
Rwanda-Rundi (Ruanda-Rundi) is a group of Bantu languages, specifically a dialect continuum, spoken in Central Africa. Neighboring dialects are mutually intelligible, but more distant ones may not be. Two dialects, Kirundi and Kinyarwanda, have been standardized as official languages of Burundi and Rwanda respectively. The other dialects are spoken in Tanzania; Ha, with one million speakers, is the most widely spoken.