1) Language of Burundi 2) Language of Tanzania 
Kirundi, also known as Rundi, is a Bantu language spoken by nine million people in Burundi and adjacent parts of Tanzania and Congo-Kinshasa, as well as in Uganda. It is the official language of Burundi. Kirundi is mutually intelligible with Kinyarwanda, an official language of Rwanda, and the two form part of the wider dialect continuum known as ...
Rundi (def. 2).