Reformed Church in Zambia rapidly. In the late 1950s eleven congregations with 3,300 members were in Zambia. Since 1982 it extended its mission work into Eastern Province, Luapula Province, Northern, Central and Northwest Zambia. The denomination was an Afrikaans church, but English service were introduced in the early 1990s. By 2000 the Reformed Church in Zambia covers all Province of the country. In 1996 the Reformed Church in Zambia formed. It had more than 500,000 members in 154 congregations, and 102 pastors, 39 evangelists in 16 presbyteries. The official languages are English, Nyanja, Chewa, Ngoni, Nsenga, Chichewa and Chewa. The Reformed Church is a
Swahili language for those areas, and the standard orthography for Swahili was adopted. Swahili has become a second language spoken by tens of millions in three African Great Lakes countries (Tanzania, Kenya, and the DRC) where it is an official or national language. In 2016, Swahili was made a compulsory subject in all Kenyan schools. Swahili and closely related languages are spoken by relatively small numbers of people in Burundi, Comoros, Malawi, Mozambique, Uganda, Zambia and Rwanda. The language was still understood in the southern ports of the Red Sea in the 20th century. Some 80 percent of approximately 49 million Tanzanians