Hutu family. Rwanda-Rundi is subdivided into the Kinyarwanda and Kirundi dialects, which have been standardized as official languages of Rwanda and Burundi respectively. It is also spoken as a mother tongue by the Tutsi and Twa. Additionally, many Hutu speak French, the other official language of Rwanda and Burundi, as a lingua franca. The Belgian-sponsored Tutsi monarchy survived until 1959, when Kigeli V was exiled from the colony (then called Ruanda-Urundi). In Burundi, Tutsis, who are the minority, maintained control of the government and military. In Rwanda, the political power was transferred from the minority Tutsi to the majority Hutu. In
Hutu of Rwandan national unity, but has been criticized as an attempt at historical revisionism. Still others suggest that the two groups are related but not identical, and that differences between them were exacerbated by Europeans, or by a gradual, natural split, as those who owned cattle became known as Tutsi and those who did not became Hutu. Mahmood Mamdani states that the Belgian colonial power designated people as Tutsi or Hutu on the basis of cattle ownership, physical measurements and church records. There is an ongoing debate as to whether the Hutu and Tutsi are really separate groups or not;