Kenya’s population is divided by language and culture into more than 40 different ethnic groups. The largest group is the Kikuyu which makes up 12 per cent of the population and is Bantu speaking. Swahili became the offical language of Kenya in 1974. It is grammatically a Bantu language even though it is heavily influenced of the population and is Bantu speaking. Swahili became the offical language of Kenya in 1974. It is grammatically a Bantu language even though it is heavily influenced by Arabic and is written with the Roman alphabet. English is also an official language and is still widely used.