School of Languages and Linguistics - Research Publications

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    Nafsan
    Billington, R ; Thieberger, N ; Fletcher, J (CAMBRIDGE UNIV PRESS, 2023-08)
    Nafsan (ISO 639-3: erk, Glottocode: sout2856), also known as South Efate, is a Southern Oceanic language of Vanuatu. It is spoken in Erakor, Eratap and Pango, three villages situated along the southern coast of the island of Efate (Figure 1) (Clark 1985, Lynch 2000, Thieberger 2006). Nafsan is also closely related to Eton, Lelepa, Nakanamanga and Namakura, spoken further to the north on Efate and some smaller neighbouring islands.1 Nafsan is often described as the southernmost member of the North-Central Vanuatu group of languages, and the Nafsan and Eton-speaking communities are noted to be at the core of ‘an unmistakable area of innovation’ compared to their northern neighbours (Clark 1985: 25). Though crosslinguistic comparisons suggest a clear boundary between North-Central Vanuatu languages and languages of the Southern Vanuatu group, there is evidence that Nafsan speakers have both linguistic and cultural links to the southern islands, suggestive of complex historical relationships between the populations of the central and southern regions (Lynch 2004; Thieberger 2007, 2015). In terms of the sound system, Nafsan is noted to be of particular interest because it ‘forms a transition between the phonologically more conservative languages to the north and the more “aberrant” languages to the south’ (Lynch 2000: 320), and exhibits phonotactic patterns which are complex and typologically uncommon, particularly among Oceanic languages (Thieberger 2006).
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    Phonetic evidence for phonotactic change in Nafsan (South Efate)
    Billington, R ; Thieberger, N ; Fletcher, J (Pacini Editore SpA, 2020)
    Nafsan, an Oceanic language of central Vanuatu, is notable for the complex phonotactic structures it exhibits compared to languages spoken further to the north, and compared to the general preference for CV syllables among Oceanic languages. Various types of heterorganic consonant clusters are found in syllable onsets, and are thought to have arisen from the loss of selected medial vowels. Medial vowel deletion is suggested to be a process of change which has been underway for some time in the language, but the details of how this process operates have not been fully clear. Unresolved questions relating to the status of length in the vowel system and the location of lexical prominence have posed a challenge to arriving at a detailed description of vowel deletion and its consequences. Drawing together recent phonetic analyses and previous work, this paper provides an overview of phonotactic structures in contemporary Nafsan and outlines the main factors which lead to the deletion of medial vowels and result in the complex syllable onsets observed today.
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    Acoustic evidence for right-edge prominence in Nafsan
    Billington, R ; Fletcher, J ; Thieberger, N ; Volchok, B (AIP Publishing LLC, 2020)
    Oceanic languages are often described as preferring primary stress on penultimate syllables, but detailed surveys show that many different types of prominence patterns have been reported across and within Oceanic language families. In some cases, these interact with segmental and phonotactic factors, such as syllable weight. The range of Oceanic prominence patterns is exemplified across Vanuatu, a linguistically diverse archipelago with over 130 languages. However, both impressionistic and instrumentally-based descriptions of prosodic patterns and their correlates are limited for languages of this region. This paper investigates prominence in Nafsan, an Oceanic language of Vanuatu for which previous observations of prominence differ. Acoustic and durational results for disyllabic and trisyllabic Nafsan words show a clear pattern of higher fundamental frequency values in final syllables, regardless of vowel length, pointing towards a preference for prominence at the right edge of words. Short vowels also show centralisation in penultimate syllables, providing supporting evidence for right-edge prominence and informing the understanding of vowel deletion processes in Nafsan.
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    Prosodic marking of focus in Nafsan
    Fletcher, J ; Billington, R ; Thieberger, N ; Calhoun, S ; Escudero, P ; Tabain, M ; Warren, P (Australasian Speech Science and Technology Association, 2019)
    Languages use a variety of means to realise informational structure categories like topicalisation and focus. The interaction between prosody and focus realisation strategies was examined in Nafsan, a Southern Oceanic language of Vanuatu, in a series of tasks that were designed to explore prosodic realisation of informational and contrastive focus on nouns that were subjects or objects in mini-dialogues where word-order was manipulated. All speakers produced utterance-initial or utterance-final focal elements with a major pitch movement associated with the focused noun (subject or object). Focused nouns were also realised with a wider pitch and often realised in their own prosodic phrase compared to the same item in non-focal contexts. There was also significant syllable lengthening at the right edge of in-focus words. In utterance-initial contexts, post-focal material in Nafsan was almost always produced in a relatively compressed pitch range and there was evidence of de-phrasing of non-focal nouns regardless of utterance position, suggesting prosodic phrasing patterns similar to other languages with edge-marking prominence.
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    Acoustic correlates of prominence in Nafsan
    Billington, R ; Fletcher, J ; Thieberger, N ; Volchok, B ; Epps, J ; Wolfe, J ; Smith, J ; Jones, C (Australasian Speech Science and Technology Association, 2018)
    Though Oceanic languages are often described as preferring primary stress on penultimate syllables, many different patterns have been noted across and within language families, and may interact with segmental and phonotactic factors. This is exemplified across linguistically diverse Vanuatu. However, both impressionistic and instrumentally-based escriptions of prosodic patterns and their correlates are limited for languages of this region. This paper presents preliminary acoustic and durational results for Nafsan, an Oceanic language of Vanuatu, which suggest a preference for prominence at the right edge of words, with fundamental frequency as a primary correlate.