With around 129 different ethnic groups, the Republic of Tanzania has evolved the greatest linguistic diversity in the whole of the African continent with four major African language bases, ranging from Bantu, Cushitic and the Nilotic languages to the less comprehensively spoken Khoisan. One of the founding directives of independent Tanzania was that no ethnic group should dominate, and this was made easier by the fact that none of the 129 tribes and sub-tribes exceeds much more than 10% of the country’s overall population. A governmental drive continues to reduce tribal differentiation by promoting Swahili.
With such a diversity of people contained within the boundaries of Tanzania, having Swahili as a national language has brought about the country’s strong sense of national identity. It is interesting to note that in Tanzania all primary school education is taught in Swahili, but when school children graduate from primary school and enter secondary school, the medium of instruction switches overnight to English. This makes for an incredibly difficult adjustment and many children drop out of school or fail their national exams at this point.
As the national language, Swahili is the most widely spoken language with English being largely absent from rural Tanzania and only really found in the larger towns, cities and tourist areas.