Tigak (or Omo) is an Austronesian language spoken by about 6,000 people (in 1991) in the Kavieng District of New Ireland Province, Papua New Guinea.
The Tigak language area includes the provincial capital, Kavieng.
Phoneme inventory of the Tigak language:
can also be realized as allophonically. Both are back-released as .
Two vowels in word-initial form can also be released as consonantal allophones .