4,000 (2015 P. Porodong), decreasing. No monolinguals (2015 P. Porodong). Ethnic population: 5,000 (2015 P. Porodong). 3,500 Lobu, 1,500 Rumanau.
Sabah: Keningau district, Sook sub-district, Lalapakon, Lanas, Kilu, Kuit, Mampisas, Manggarimot, Mansiat, Minusu, Pinipi, Sesalungon, and Tuawon; possibly Kinabatangan district. Rumanau dialect in Masaum, near Pinangah.
Lobu, Rumanau (Romanau, Roomarrows, Rumanau Alab). May be a dialect of Upper Kinabatangan [dmg].
Mixed use in Home, Friends, Religion, Work and Education. Some children, adolescents, and young adults; all adults and elderly. Positive attitudes. All also use Sabah Malay [msi]. Many also use Standard Malay [zsm]. Many also use Kadazan Dusun [dtp], specifically the Dusun Tambunan dialect. Some also use Bookan Murut [bnb], Minokok [mqq].
Latin script [Latn].
Christian, Muslim, traditional religion.