|Glottolog||nort3172 (Northeast Sabahan)
sout3154 (Southwest Sabahan)
The constituents are separated into two families in Blust (2010):
- Northeast Sabahan
- Southwest Sabahan
Lobel (2013, p. 47, 361) proposes the following internal classification of Southwest Sabahan, based on phonological and morphological evidence.
Lobel (2013:367-368) lists the following Proto-Southwest Sabahan phonological innovations that were developed from Proto-Malayo-Polynesian. (Note: PSWSAB stands for Proto-Southwest Sabahan, while PMP stands for Proto-Malayo-Polynesian.)
- PMP *h > PSWSAB Ø
- PMP *a > PSWSAB *ə / _# (possibly be an areal feature in Sabah or northern Borneo, since this is also found in Idaanic)
- PMP *R > PSWSAB *h / (a,i,u)_(a,ə,u)
- PMP *R > PSWSAB *g / ə_
- PMP *-m- > ø in PSWSAB reflexes of the PMP pronoun forms *kami ‘1EXCL.NOM’, *mami ‘1EXCL.GEN’, and *kamu ‘2PL.NOM’
- Reduction of most PMP consonant clusters to either singletons or prenasalized clusters
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Northeast Sabahan". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Southwest Sabahan". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Lobel, Jason William (2013). "Southwest Sabah revisited". Oceanic Linguistics. 52: 36–68. doi:10.1353/ol.2013.0013. Retrieved 25 February 2016.
- K. Alexander Adelaar and Nikolaus Himmelmann, The Austronesian languages of Asia and Madagascar. Routledge, 2005.
- King, Julie K., and John Wayne King. 1984. Languages of Sabah: A survey report. C-78. Canberra: Pacific Linguistics, The Australian National University.
- Lobel, Jason William. 2013. Philippine and North Bornean languages: issues in description, subgrouping, and reconstruction. Ph.D. dissertation. Manoa: University of Hawai'i at Manoa.
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