The Hawu language (Hawu: Lii Hawu) is the language of the Savu people of Savu Island in Indonesia and of Raijua Island off the western tip of Savu. Hawu has been referred to by a variety of names such as Havu, Savu, Sabu, Sawu, and is known to outsiders as Savu or Sabu (thus Havunese, Savunese, Sawunese). Hawu belongs to the Malayo-Polynesian branch of the Austronesian language family, and is most closely related to Dhao (spoken on Rote) and the languages of Sumba. Dhao was once considered a dialect of Hawu, but the two languages are not mutually intelligible.

The Seba (Mèb'a in Hawu) dialect is dominant, covering most of Savu Island and the main city of Seba. Timu (Dimu in Hawu) is spoken in the east, Mesara (Mehara in Hawu) in the west, and Liae on the southern tip of the island. Raijua is spoken on the island of the same name (Rai Jua 'Jua Island'), just off-shore to the west of Savu.

The following description is based on Walker (1982) and Grimes (2006).

Hawu *s, attested during the Portuguese colonial era, has debuccalized to /h/, a change that has not happened in Dhao. The Hawu consonant inventory is smaller than that of Dhao:

Consonants of the /n/ column are apical, those of the /ɲ/ column laminal. In common orthography, the implosives are written ⟨b', d', j', g'⟩. ⟨w⟩ is pronounced [v], [β], or [w]. A wye sound /j/ (written ⟨y⟩) is found at the beginning of some words in Seba dialect where Timu and Raijua dialects have /ʄ/.

Vowels are /i u e ə o a/, with /ə/ written ⟨è⟩ in common orthography. Phonetic long vowels and diphthongs are vowel sequences. The penultimate syllable/vowel is stressed. (Every vowel constitutes a syllable.) A stressed schwa lengthens the following consonant:

/ŋa/ [ŋa] 'with', /niŋaa/ [niˈŋaː] 'what?', /ŋaʔa/ [ˈŋaʔa] 'eat, food', /ŋali/ [ˈŋali] 'senile', /ŋəlu/ [ˈŋəlːu] 'wind'.

Syllables are consonant-vowel (CV) or vowel-only (V).