Research Findings: In Swedish preschools, second-language learners often display lower engagement in activity settings than first-language learners. This study used a multilevel model to examine the association between children’s language status, classroom structure, teacher qualifications, and engagement in preschool activity settings. The sample included 148 children, aged three to five, from classrooms with varying proportions of first and second-language learners. The Child Observation in Preschool (COP) instrument measured engagement levels. Our findings reveal that the presence of highly qualified teachers significantly increased the duration of high engagement for all children, regardless of language status. While second language learners initially appeared to show lower engagement, this difference was insignificant in the full model after accounting for classroom structure and teacher qualifications. Classrooms with a higher proportion of qualified teachers demonstrated improved engagement across the board. Policy and Practice: These findings underscore the importance of ensuring a high proportion of qualified teachers in early childhood education and care settings. Creating a supportive, high-quality educational environment is essential for fostering engagement among all children but may be particularly crucial in classrooms with diverse language backgrounds.