Validation of the multidimensional attitudes toward preschool inclusive education scale in the bilingual context of Québec

•A measure of attitudes toward inclusive education was adapted to French.•The factor structure of the adaptation differed from the original instrument’s.•The MATIES/MATPIES may function differently across languages and cultures.•A new factor structure is proposed for the bilingual context of Québec.•Psychometric validation is more complex when two linguistic groups coexist.