History of The Proposal
Kwa was proposed in the late 19th century for the Akan (or perhaps Tano), Gã, and Gbe languages, which have kwa or kua as their word for 'human being'. Since then the proposal has been dramatically expanded, only to be reverted to something approaching its initial conception.
In 1952 Westermann and Bryan expanded Kwa to the various Lagoon languages of southern Ivory Coast and to what are now called the Volta–Niger languages of southern Nigeria. Greenberg (1963) added the Kru languages of Liberia, the Ghana–Togo Mountain languages which Westermann and Bryan had specifically excluded, and Ijaw of the Niger delta; West Kwa included the languages from Liberia to Dahomey (Republic of Benin), and East Kwa the languages of Nigeria. Bennett & Sterk (1977) proposed that the Yoruboid and Igboid languages belonged in Benue–Congo rather than in Kwa. Stewart (1989) removed Kru, Ijaw, and Volta–Niger (East Kwa), but kept the Ghana–Togo Mountain and Lagoon languages, as well as adding a few obscure, newly described languages. Stewart's classification is the basis of more recent conceptions. In order to disambiguate this from Greenberg's influential classification, the reduced family is sometimes called "New Kwa".
Read more about this topic: Kwa Languages
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