South Africa Then: Kaffir
Kaffir - (from the Arabic kafir, meaning “disbeliever): word used since the 17th century by the English, Dutch, and Afrikaans to describe South African black people. During the Apartheid era, the word acquired a derogatory meaning and is now considered an official ethnic slur, comparable to the n-word.
By 1976, the use of this word was actionable in a court of law. In 2000, the Promotion of Equality and Prevention of Unfair Discrimination Act banned the use of words that were meant to inspire hatred, including derogatory racial terms.