Conducting a functional analysis is the "gold standard" of behavior assessment with best practices recommending identification of idiosyncratic variables as essential to valid results. One potential variable that might impact assessment results is language of assessment. For individuals who operate in environments with multiple languages (e.g., English and Spanish), the language of assessment might differentially impact assessment results. Therefore, there is a need to evaluate if language of assessment affects identified function. The current study presents the results of 10 cases in which the experimenters conducted assessments (i.e., functional analysis) in both the Spanish and English language. Participants were nine children with autism who engaged in problem behavior and whose parents reported Spanish as the primary home language. Result indicates correspondence of function for eight of the ten cases. Discussion of results and recommendations for practice and future research are presented.