Wayoró language
endangered language of Brazil

Wayoró (also Wayoro, Ajurú, Wajuru; Wayoró: wayoro emẽto [βajoˈɾo ɛmɛ̃ˈto]) is a moribund Tuparian language (Tupian family), which is spoken in the state of Rondônia, in the Amazon region of Brazil. As of 2019, there were reported to be 3 speakers (all above 70 years old) and 11 semispeakers out of the ethnic population of approximately 250.
Dialects
The Wajuru people is subdivided into three subgroups: the Ngwayoroiat (‘those from the Stone’), the Ngwãkũyãian (‘the Agouti ones’), and the Kupndiiriat (‘the Forest ones’). Some lexical and phonological differences have been reported between the varieties spoken by the Ngwayoroiat (Wayoroiat) and by the Kupndiiriat.
Phonology
Consonants
The graphemes which correspond to each phoneme are given in ⟨brackets⟩.
Underlying nasal consonants may be partially or fully oralized in oral environments. Nogueira (2019) describes the following allophones:
/m/ → [m] ⟨m⟩, [mb] ⟨mb⟩
/n/ → [n] ⟨n⟩, [nd] ⟨nd⟩
/ɲ/ → [ɲ, j, j̃, jᵗ] ⟨y⟩, [ndʒ, dʒ] ⟨dj⟩
/ŋ/ → [ŋ, ŋg] ⟨ng⟩, [g] ⟨g⟩
/ŋʷ/ → [ŋʷ, ŋgʷ] ⟨ngw⟩, [gʷ] ⟨gw⟩
Vowels
Syntax
As in other Tuparian languages, the main clauses of Wayoró follow the cross-linguistically rare nominative–absolutive pattern. Person prefixes on the verb are absolutive, i.e., they index the sole argument of an intransitive verb (S) and the patient argument ('direct object') of a transitive verb (P). Person pronouns, which follow the verb (either cliticizing to it or not) are nominative: they may encode the sole argument of an intransitive verb (S) or the agent argument of a transitive verb (A), but not the patient of a transitive verb (P). This is exemplified below.
Begin with the source’s own compact description: “Wayoró language” is endangered language of Brazil. The dossier treats that line as a proposition to test through Wayoró, language and endangered, not as a finished interpretation.
Why this record matters
The phrase “endangered language of Brazil” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 10, 2026. The linked authority identifier is Q2875044. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2019.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Wayoró language”, its source revision and the description used here.
- Expand the search: follow Wayoró language primary sources, Wayoró language archive and Wayoró research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Wayoró language”?
- Which institution is responsible for the underlying evidence?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Wayoró language” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.