in the 1990s with regards to the Nguni group , neville Alexandre suggested a single language as Nguni including Zulu , isixhosa , swati and Ndebele as Dialectal varieties of such language . using the...

in the 1990s with regards to the Nguni group , neville Alexandre suggested a single language as Nguni including Zulu , isixhosa , swati and Ndebele as Dialectal varieties of such language . using the appriate terms and concepts , explain the critaria that may be rationale behind such suggestion