The Murutic languages are a family of half a dozen closely related Austronesian languages, spoken in the northern inland regions of Borneo by the Murut and Tidung.
Tagol Murut is commonly used and understood by a large majority of the Murut peoples.
Lobel (2013:360) also lists the languages Abai Sembuak, Abai Tubu, and Bulusu (all spoken near Malinau town in North Kalimantan) as Murutic languages. On the other hand, Abai Sungai, spoken in eastern Sabah, is a Paitanic language.
Lobel (2016)
Lobel (2016) covers the following Greater Murutic languages, including Tidong:
Lobel (2013:367) lists the following Murutic phonological innovations. (Note: PSWSAB stands for Proto-Southwest Sabahan, while PMP stands for Proto-Malayo-Polynesian.)
PMP/PSWSAB *R > *h / __ V (except after *ə, where it had already shifted to *g in PSWSAB). Subsequently, Proto-Greater Murutic *h > Ø occurred in all daughter languages except Papar.
PMP/PSWSAB *R > *g / __ #
PMP/PSWSAB *aw > *ow; *ay > *oy
PMP/PSWSAB *iw > *uy
PGMUR *g- > Ø after the adjectival prefix *ma-
PMP/PSWSAB *ə > *a in non-final syllables, except in the environment *_Cə, where it is reflected as /o/
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