Kizomba is a genre of dance and a musical genre originating in Angola, and it means “party” in Kimbundu, an Angolan language. Kizomba dance is a derivative of the Angolan Semba and Kizomba music is a derivative of traditional Angolan Semba music with the French Antilles Zouk.
The origins of kizomba can be traced to late-1970s Africa, with influences variably attributed to Angola. Kizomba is characterised by a slower, romantic, more sensuous rhythm than the traditional Angolan semba dance. Kizomba music emerged as a more modern music genre with a sensual touch mixed with African rhythm and Haitian Compas or (Kompa in Haitian Creole). Kizomba is Angolan Zouk, most kizomba songs are sung in Portuguese.
Semba has been danced in the 1950s in Angola. In the 1990s, when the actual kizomba music got more and more popular, Angolan semba dancers started to adapt their semba steps according to the tempo and flavour of the Kizomba beats.
Info from the English Wikipedia. For more see the Wikipedia: https://en.wikipedia.org/wiki/Kizomba