This question concerns adnominal demonstratives (not pronominal demonstratives) and whether they can agree in number with the head noun. Number marking on demonstratives counts as agreement even if the head noun is not overtly marked for number.
Haitian (ISO 639-3: hat, Glottolog: hait1244)
Coded 1. "In Creole, the demonstrative determiner makes the noun more specific. It has the forms: sa-a for the singular, sa-yo for the plural." (Valdman 1988: 27)
a. Li achte chemiz-sa-a he bought shirt-DEM-SG ‘He bought this/that shirt.’ (Valdman 1988: 27) b. Kote timoun-sa-yo? where children-DEM-PL ‘Where are these/those children?’ (Valdman 1988: 27)
Hulaulá (ISO 639-3: huy, Glottolog: hula1244)
Coded 0. Attributive demonstratives do not inflect for number. Demonstratives only inflect for number if they are used as pronouns (Khan 2009: 60).
Corbett, Greville G. 2000. Number. Cambridge: Cambridge University Press.
Khan, Geoffrey. 2009. The Jewish Neo-Aramaic dialect of Sanandaj. Piscataway: Gorgias.
Valdman, Albert. 1988. Ann Pale Kreyol: An introductory course in Haitian Creole. Bloomington: Indian University.
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