Official Languages of Kenya. English was inherited from Kenya's British colonial past. English is the language of choice in business, academics and social set-ups in Kenya. Swahili (also called Kiswahili) is the national language of Kenya.he Luhya language is not a single language but rather, it is a collection of mutually understood dialects spoken by the Luhya people of Western Kenya. The Luhya are the second largest ethnic group following the Kikuyu. The two biggest Luhya sub-tribes are the Maragoli and the Bukusu.