Nguni languages

The Nguni languages are a group of Bantu languages spoken in southern Africa (mainly South Africa, Zimbabwe and Eswatini) by the Nguni people. Nguni languages include Xhosa, Hlubi, Zulu, Ndebele, and Swati. The appellation "Nguni" derives from the Nguni cattle type. Ngoni (see below) is an older, or a shifted, variant.

It is sometimes argued that the use of Nguni as a generic label suggests a historical monolithic unity of the people in question, where in fact the situation may have been more complex. The linguistic use of the label (referring to a subgrouping of Bantu) is relatively stable.

From an English editorial perspective, the articles "a" and "an" are both used with "Nguni", but "a Nguni" is more frequent and more correct especially if "Nguni" is pronounced as it is suggested.

Classification
Within a subset of Southern Bantu, the label "Nguni" is used both genetically (in the linguistic sense) and typologically (quite apart from any historical significance).

The Nguni languages are closely related, and in many instances different languages are mutually intelligible; in this way, Nguni languages might better be construed as a dialect continuum than as a cluster of separate languages. On more than one occasion, proposals have been put forward to create a unified Nguni language.

In scholarly literature on southern African languages, the linguistic classificatory category "Nguni" is traditionally considered to subsume two subgroups: "Zunda Nguni" and "Tekela Nguni". This division is based principally on the salient phonological distinction between corresponding coronal consonants: Zunda and Tekela  (thus the native form of the name Swati and the better-known Zulu form Swazi), but there is a host of additional linguistic variables that enables a relatively straightforward division into these two substreams of Nguni.

Tekela languages

 * Bhaca
 * Hlubi
 * Lala
 * Nhlangwini
 * Northern Transvaal Ndebele (Sumayela Ndebele)
 * Phuthi
 * Swazi

Zunda languages

 * Matabele (Ndebele)
 * Southern Ndebele (South African Ndebele)
 * Xhosa
 * Zulu

Note: Maho (2009) also lists S401 Old Mfengu†.

Characteristics
The following aspects of Nguni languages are typical:
 * A 5-vowel system, by merging the near-close and close series of Proto-Bantu. (Phuthi has re-acquired a new series of superclose vowels from Sotho)
 * Spreading of high tones to the antepenultimate syllable.
 * A distinction between high and low tones on noun prefixes, indicating different grammatical roles, accompanied in some cases by an overt pre-prefix called the augment.
 * Development of breathy-voiced consonants, acting as depressor consonants.
 * Development of aspirated consonants.
 * Development of click consonants.

Comparative data
Compare the following sentences:

Note: Xhosa $\langletsh\rangle$ = Phuthi $\langletjh\rangle$ = IPA ; Phuthi $\langletsh\rangle$ = ; Zulu $\langlesh\rangle$ = IPA, but in the environment cited here  is "nasally permuted" to. Phuthi $\langlejh\rangle$ = breathy voiced = Xhosa, Zulu $\langlej\rangle$ (in the environment here following the nasal ). Zulu, Swazi, Hlubi $\langleng\rangle$ =.

Note: Phuthi $\langlekg\rangle$ = IPA.