The Ataitan languages, also known as the Tanggu or Moam River languages, are a small family of clearly related languages spoken in the region of the Moam River in Papua New Guinea.
They are classified among the Ramu languages of northern Papua New Guinea.
Usher (2020) reconstructs the consonant inventory as follows:[1] Vowels are *i *ʉ *u *a.
Usher (2020) reconstructs the pronouns as:[1] Plus 1sg object *na.
Proto-Tamolan–Ataitan (Proto-Guam–Moam) is nearly identical, except for not having the [aɣ] suffixes, and the final vowels of the 1du and 2du forms is not certain.