The Sko or Skou languages are a small language family spoken by about 7000 people, mainly along the coast of Sanaun Province in Papua New Guinea, with a few being inland from this area and at least one just across the border in the Indonesian province of Papua (formerly known as Irian Jaya). Skou languages are unusual in New Guinea for being tonal. Vanimo, for example, has three tones, high, mid, low.