Our paper presents the methodological approach of group discussions and documentary method to investigate team beliefs in Early Childhood Education and Care facilities. The research addresses the question of how team beliefs on multilingualism and language education are shaped. To reconstruct team beliefs, we used group discussions and the sociologically informed documentary method, which is a two-step content and discourse analysis. The data analysis gives insights into the teams' conflicts, perceptions, and shared beliefs concerning the use of home languages in the facilities. This methodological approach offers a perspective that adds to the investigation of individual beliefs on multilingualism and language education by covering collective orientations in organisations.