Twi (Akan: [tɕᶣi]; also known as Akan Kasa) is a dialect of the Akan language spoken in southern and central Ghana by several million people, mainly of the Akan peoples, the biggest of the about 17 major ethnicities/peoples in Ghana and forms about 29% of the Ghanaian population as a first and second language. Twi is a common name for two former literary dialects of the Akan language; Asante (Ashanti) and Akuapem, which are mutually intelligible. There are about 9 million Twi speakers, mainly originating from the Ashanti Region and about a total of 17–18 million Ghanaians as either first or second languages. Akuapem Twi was the first Akan dialect to be used for Bible translation, and became the prestige dialect as a result. It is also spoken by the Southeastern people of Cote D'Ivoire.
(Courtesy of Twi Language Wikipedia)