Although the development of Kiswahili in Tanzania has had a number of stumbling blocks, it is slowly developing into a language of modern technology. Individual institutions have contributed greatly to its spread and promotion. More books are now published in Kiswahili than ever before, and scientific and technical terminology has been developed. The boundaries of the language have been expanded greatly in the last 20 years, and it is now one of Africa's major lingua francas. To assure development of Kiswahili in Tanzania, experts must redevelop the existing unclear areas of language planning and language policy. The development of Kiswahili language requires more government attention and intervention, for example, through the commissioning of texts in Kiswahili, the translation of important textbooks into Kiswahili, and the formation of serious and effective commissions for the development of terminology. Similar change has been achieved in other languages. In addition, because English in the schools has actually hindered the learning process, Kiswahili should be considered as a course rather than a medium of instruction. (MSE)