Complex sentence: The Zimbabwean Ndebele and Transvaal Ndebele languages are not variants of the same language; though they both fall in the Nguni group of Bantu languages, Zimbabwean Ndebele is essentially a dialect of Zulu, and the Transvaal Ndebele language falls within a different subgroup.
Split into simpler sentences: The Zimbabwean Ndebele and Transvaal Ndebele languages are not variants of the same language. They both fall in the Nguni group of Bantu languages, but Zimbabwean Ndebele is essentially a dialect of Zulu, and Transvaal Ndebele is within a different subgroup.