Nunukan Tidung
Nunukan Tidong or Southern Tidung, is one of several Sabahan languages of Kalimantan, Indonesia, spoken by the Tidong people. It has lost the system of Austronesian alignment retained by Northern Tidung in Sabah, Malaysia.

Phonology 

 [ʔ] may also occur, but only phonetically before initial vowels.

 [e] and [o] may also occur, but only in complimentary distribution with /i/ and /u/.

References

Murutic languages
Languages of Sabah
Languages of Indonesia