Overview
Labu (called Hapa by its speakers) is an Austronesian language of Papua New Guinea.
Locations
Labu is spoken by 1,600 people (1989) in three older villages and one new one across the Markham River from Lae in Morobe Province, Papua New Guinea. The three older villages are Labubutu (locally known as Dusuku), Labumeti (Ehalo), and Labutali (Kakala) in Wampar Rural LLG.
Contact
Although it belongs to the Lower Markham languages, Labu appears to have been strongly influenced by the coastal languages of the Huon Gulf, Bukawa in particular. For instance, Labu shows tonal contrasts, like Bukawa but unlike any of the Markham languages; and Labu numerals show separate forms for '3', '4', and '5', like Bukawa, even though salu '2', sidi '3', and sôha '4' contain the Lower Markham numeral classifier *sV-. (The pattern for numerals in the other Markham languages is '1', '2', '2+1', '2+2', then 'hand' or '2+2+1', and so on.)
Phonology
Labu distinguishes 7 vowels and 17 consonants. The vowels also exhibit contrasts between high and low pitch (or "tone"), just as in Yabêm, the Lutheran mission lingua franca for the coastal languages of Morobe Province during much of the 20th century. The orthography of Labu is based on that of Yabêm (= Jabêm), except that y replaces Yabêm j.
From Wikipedia (CC BY-SA 4.0).