As the westernmost language within the Pitu Ulunna Salu subgroup, Ulumanda' borders the Mamuju and Mandar languages. So extensive is dialect chaining in this area that Ulumanda' wasn’t recognized as a language separate from its neighbors until surveys were carried out in 1984 and 1985 (Strømme 1987:31–32; Strømme and Valkama 1987:83 ff.; see also Friberg and Laskowske 1989:6–8).
In the 1980s the number of Ulumanda' in all regencies was estimated at around 30,000 speakers (Friberg and Laskowske 1989:8). An updated population estimate is not available.
Friberg, Timothy; and Thomas V. Laskowske. 1989. South Sulawesi languages, 1989. Studies in Sulawesi linguistics, part 1 (NUSA: Linguistic Studies of Indonesian and Other Languages in Indonesia, 31), edited by James N. Sneddon, 1–17. Jakarta: Badan Penyelenggara Seri Nusa, Universitas Katolik Indonesia Atma Jaya. [Reproduced online. URL: http://sealang.net/archives/nusa/pdf/nusa-v31-p1-18.pdf (accessed January 13, 2014).]
Strømme, Kåre J. 1987. Kabupaten Polewali Mamasa, west-central section. UNHAS-SIL South Sulawesi sociolinguistic surveys, 1983–1987 (Workpapers in Indonesian Languages and Cultures, 5), edited by Timothy Friberg, 17–40. Ujung Pandang: Summer Institute of Linguistics.
Strømme, Kåre J.; and Kari Valkama. 1987. Kabupaten Polewali Mamasa, southwestern section, and Kabupaten Majene. UNHAS-SIL South Sulawesi sociolinguistic surveys, 1983–1987 (Workpapers in Indonesian Languages and Cultures, 5), edited by Timothy Friberg, 59–98. Ujung Pandang: Summer Institute of Linguistics.