This study examined the potential for children’s multilingual development supported by a digital e-book application (Polyglutt) used in Swedish preschools. The analysis focused on the app’s software design and the reflections of 17 preschool teachers in a large Swedish city, many of whom work with multilingual groups of children. A social semiotic perspective of multimodality was utilized to evaluate the app’s potential and a qualitative content analysis was employed to analyse the interviews. Findings indicated that the app was popular among the teachers and was considered an efficient tool for read-aloud activities, although the potential for multilingual purposes was rarely realized. The analysis shows that the app has potential for multilingual interaction, yet the design does not always make this clearly visible. Didactic implications of the use of the application are critically discussed.