Previous work had shown that multilingual preschool children are better at interpreting deictic gestures than their monolingual peers. The present study examines whether this multilingual effect persists beyond preschool age and whether it extends to iconic (i.e., representing the referent) and conventional (i.e., holding an arbitrary meaning) gestures. A total of N = 105 children (aged 3 to 8), varying in their balance of exposure to more than one language since birth, completed a gamified gesture comprehension task. The three gesture types were presented in four communicative conditions, namely (1) alone, with (2) reinforcing or (3) supplementing speech, compared to (4) speech produced alone. Analyses revealed that children with greater balance in their multilingual exposure understood significantly more speechless iconic gestures than children with less balanced multilingual exposure. Findings align with previous work and theoretical frameworks, indicating that multilingual exposure enhances children’s sensitivity to non-verbal communicative cues.
