
Kenya is a multilingual country. The Bantu Swahili language and English, the latter being inherited from colonial rule, are widely spoken as lingua franca. They serve as the two official working languages. Including second-language speakers, there are more speakers of Swahili than English in Kenya.

Aweer (Aweera), also known as Boni, is a Cushitic language of Eastern Kenya. The Aweer people, known by the arguably derogatory exonym "Boni," are historically a hunter-gatherer people, traditionally subsisting on hunting, gathering, and collecting honey. Their ancestral lands range along the Kenyan coast from the Lamu and Ijara Districts into Southern Somalia's Badaade District.

Gujarati is an Indo-Aryan language native to the Indian state of Gujarat and spoken predominantly by the Gujarati people. Gujarati is part of the greater Indo-European language family. Gujarati is descended from Old Gujarati. In India, it is the official language in the state of Gujarat, as well as an official language in the union territory of Dadra and Nagar Haveli and Daman and Diu. As of 2011, Gujarati is the 6th most widely spoken language in India by number of native speakers, spoken by 55.5 million speakers which amounts to about 4.5% of the total Indian population. It is the 26th most widely spoken language in the world by number of native speakers as of 2007.

The Ilchamus, are a Maa-speaking people living south and southeast of Lake Baringo, Kenya. They numbered approximately 32,949 people in 2019 and are closely related to the Samburu living more to the north-east in the Rift Valley Province. They are one of the smallest ethnic groups in Kenya.

Maasai (Masai) or Maa is an Eastern Nilotic language spoken in Southern Kenya and Northern Tanzania by the Maasai people, numbering about 800,000. It is closely related to the other Maa varieties: Samburu, the language of the Samburu people of central Kenya, Chamus, spoken south and southeast of Lake Baringo ; and Parakuyu of Tanzania. The Maasai, Samburu, il-Chamus and Parakuyu peoples are historically related and all refer to their language as ɔl Maa. Properly speaking, "Maa" refers to the language and the culture and "Maasai" refers to the people "who speak Maa."

The Nilotic languages are a group of related languages spoken across a wide area between South Sudan and Tanzania by the Nilotic peoples.

Oromo is an Afroasiatic language that belongs to the Cushitic branch. It is native to the Ethiopian state of Oromia and spoken predominantly by the Oromo people and neighbouring ethnic groups in the Horn of Africa. It is used as a lingua franca particularly in Ethiopia and northeastern Kenya.

The Sakuye are clan of the Oromo people living in Marsabit and Isiolo Counties, Northern Frontier District Region, now Northern Kenya.

Somali is an Afroasiatic language belonging to the Cushitic branch. It is spoken as a mother tongue by Somalis in Greater Somalia and the Somali diaspora. Somali is an official language of Somalia and Somaliland, a national language in Djibouti, and a working language in the Somali Region of Ethiopia and also in North Eastern Kenya. The Somali language is written officially with the Latin alphabet although the Arabic alphabet and several Somali scripts like Osmanya and the Borama script are informally used.

Swahili, also known by its native name Kiswahili, is a Bantu language and the native language of the Swahili people. It is one of two official languages of the East African Community (EAC) countries, namely Burundi, Kenya, Rwanda, South Sudan, Tanzania, and Uganda. It is a lingua franca of other areas in the African Great Lakes region and East and Southern Africa, including some parts of the Democratic Republic of the Congo (DRC), Malawi, Mozambique, Somalia, and Zambia. Swahili is also one of the working languages of the African Union and of the Southern African Development Community. The exact number of Swahili speakers, be they native or second-language speakers, is estimated to be between 50 million to 150 million.

The Terik people are a Kalenjin group inhabiting parts of the Kakamega and Nandi Districts of western Kenya, numbering about 23,324 people. They live wedged in between the Nandi, Luo and Luhya (Luyia) peoples. Among the Luo they are known as nyangóóri, but to the Terik, this is a derogatory term. The Terik call themselves Terikeek; in their usage, 'Terik' refers to their language, land, and culture.