Harákmbut or Harakmbet (stress on the second syllable) is the native language of the Harakmbut people of Peru.

It is spoken along the Madre de Dios and Colorado Rivers, in the pre-contact country of the people.

There are two dialects that remain vital: Amarakaeri (Arakmbut) and Watipaeri (Huachipaeri), which are reported to be mutually intelligible.

[2] Speakers of Watipaeri (wa-tipa-eri) are mostly concentrated in the indigenous communities of Queros and Santa Rosa de Huacaria, in the Peruvian rainforest.

Their members have been experiencing cultural loss, including the complexities of their language, particularly because of the generational gap between the elders and the youth.

[7] Glottolog notes "promising lexical links with Katukina [...] with a fair amount of near-identical forms, but the systems of pronouns, numerals or bound morphology show no cognation.

[citation needed] Jolkesky (2016) notes that there are lexical similarities with the Pano, Puinave-Nadahup, Tupian, and Arawakan language families due to contact.

[8] Similarities with Tupian may be indicative of an earlier origin downstream in the Madeira River interaction sphere.

Some researchers have divided the dialects into two main groups, with Watipaeri and Toyoeri phonetically and lexically somewhat different from Amarakaeri/Arakmbut, Arasaeri and Sapiteri.

)[2] The nasal consonants have different realizations, depending on whether adjacent vowels are oral or nasal, with /m/ and /n/ affected before an oral vowel, and /n/ and /ŋ/ affected after one: This allophonic variation is reflected in the community orthography, and the same pattern has been reported for Watipaeri, Arasaeri, Toyoeri and Sapiteri.

[2] The nature of Harakmbut nasality has yet to be fully elucidated, and in Amarakaeri at least there is some free variation of allophones.

While often used in adjectives, it is unclear the exact function of the suffix -nda outside of being a focus marker in the noun phrase.

After the verbs stem, the suffixes denote the aspect, associated motion, the verbal plural, tense, and transitivity.

Loukotka (1968) lists the following basic vocabulary items for Toyeri (also spelled in other sources as Toyoeri), a variety of Harákmbut.