A chapter in the anthropological monograph of Mills (1926) provides a grammatical sketch of the variety of Mongsen Ao spoken in Longjang village. Coupe (2003) is one of the few acoustic studies published on a Kuki-Chin-Naga language (only three exist). Coupe (2007) is a reference grammar of the language, based on a revision of his PhD dissertation (Coupe 2004).
Alphabet
The Ao alphabet is based on the Latin script and was developed in the 1880s by the Christian missionary Edward W. Clark for Chungli Ao. The system is not based on phonemic principles and does not represent tone. A Christian Bible was published using the orthography in 1964. Coupe (2003) suggests a more consistent alphabet for Mongsen Ao.
A, B, C, E, I, J, K, L, M, N, Ng, O, P, R, S, T, U, Y, Z, Ü
Phonology
This section describes the sound system of Mongsen Ao as spoken in Mangmetong village and is based on Coupe (2007).
The two low vowels /a,a̰/ differ in terms of phonation type. /a/ has modal voice (i.e. normal phonation); /a̰/ has creaky voice (also known as vocal fry, laryngealization). Coupe (2003) argues that this is a separate vowel phoneme and not a tone, a glottal stop, or resulting from prosodic effects.
The post-alveolar approximant /ɹ/ varies from an apical post-alveolar to subapicalretroflex: [ɹ̠~ɻ].
The glottal stop/ʔ/ occurs only at the end of words. However, in this position it contrasts with words ending in vowels: /āmī/ 'spear' vs. /āmīʔ/ 'person'. When a suffix is added to such words, the /ʔ/ is deleted: /tʃàʔ/ 'to eat' + /-ʉ̄ʔ/ CAUS → /tʃàʉʔ/ 'to cause to eat'. Thus, the glottal stop has a somewhat marginal phonemic status.
Tone
Ao is a tonal language with 3 contrasting lexical tones:
high
mid
low
All are register tones.
Syllable and phonotactics
The generalized syllable structure of Ao is abbreviated as the following:
(C1)V(G)(C2)+T
(C1)
Any of the 20 consonants may appear as an optional syllable onset (excluding the word-final /ʔ/).
V
All 6 vowels may occur as the syllable nucleus.
(G)
The optional glide elements following the head vowel are essentially non-syllabic offglide realizations of the 4 vowels /i,ʉ,u,a/. For example, /jàuŋ/ → [jàu̯ŋ] 'species of centipede'.
The following are the possible tautsyllabic combinations: [iu̯,ia̯,əʉ̯,əu̯,ai̯,aʉ̯,au̯].
(C2)
The following consonants may occur in the optional syllable coda: unaspirated stops, nasals, and the rhotic /p,t,k,m,n,ŋ,ɹ/. The glottal stop with its restricted distribution also occurs but only word-finally.
T
All syllables occur with one of the three tones. In a VG sequence, tone only occurs the vowel head.
This section needs expansion. You can help by adding to it. (May 2008)
Syntax
Ao is an SOV language with postpositions. Adjectives, numerals and demonstratives follow the nouns they modify, whilst relative clauses may be either externally or internally headed. Adverbial subordinators are suffixes attached to the verb and the end of the subordinate clause.
Clark, E. W. (1981) [1893]. The Ao-Naga Grammar with Illustrations, Phrases, and Vocabulary. Delhi: Gian Publications, Mittal Publishers Distributors.
Coupe, Alexander R. (2003). A Phonetic and Phonological Description of Ao: A Tibeto-Burman Language of Nagaland, North-east India. Pacific Linguistics. Vol. 543. Canberra: The Australian National University. doi:10.15144/PL-543. ISBN0-85883-519-3.
Coupe, Alexander R. (2004). The Mongsen Dialect of Ao: a language of Nagaland (PhD dissertation). La Trobe University.