Kirundi 29.7% (official), Kirundi and other language 9.1%, French (official) and French and other language 0.3%, Swahili and Swahili and other language 0.2% (along Lake Tanganyika and in the Bujumbura area), English and English and other language 0.06%, more than 2 languages 3.7%, unspecified 56.9% (2008 est.)