Alagüilac is an undocumented indigenous American language that is thought to have been spoken by the Alaguilac people of Guatemala at the time of the Spanish conquest.
Brinton may have been misled by his sources: In 1576 Palacio reported the language of Acavastlan, Guatemala, which he called Tlacacebatleca.
[4] Others have suggested that Acaguastlán could have been bilingual in Pipil and a Maya language such as Poqomchiʼ or Poqomam.
[2] However, Campbell argues that the presence of the Pipil or Nahua in the Motagua River valley could have been the result of forced population movements after the Spanish Conquest.
For example, the neighboring town of Salamá was a Pipil community populated by slaves brought in by the Spanish governor, Pedro de Alvarado.