1,000 (2006 census). 50 monolinguals. Ethnic population: 1,420.
Separate shared enclaves (3); north, Caaguazu and Alto Parana departments, northwest of Itaouyry; and central, Lake Del Rio Yguazu area; Caaguazu, Guaira, and Paraguari departments, area between Colonel Oviedo and Colonel Villaricca; south enclave entirely within Alto Parana Department, Narranja and Iruno districts; dialects: Chupa Pou, Kontuwy, Kontuwywe, Arroyo Bandera, Cerro Moroti, Puerto Barra, Ypetimi.
Ache gatu, Ache purä, Ache wa, Ñacunday River Ache (“Ache irollä” (pej.)). 3 dialects remaining, Ache purä is dormant. High Intelligibility between Ache gatu and Ache wa, only Ñancunday River Ache’s intelligibility is low for the other two dialects.
SOV; postpositions; noun head initial; content q-word initial; clause constituents indicated by word order; both tense and aspect; passives; nontonal; 15 consonant and 12 vowel phonemes.
Latin script [Latn].
Christian, traditional religion.