Kustenau (Kustenaú) is an extinct Arawakan language of Brazil.
Kustenau has the vowels /i, e, è, u, a/.
The consonants are /p, t, k, m, n, s, ÃÂ, h, æ, ç, þ, l, w, j/.
Unless specified, stress always falls on the penultimate syllable.