In recent years, there has been an increase in the prevalence of comorbidity between ASD and epilepsy in the pediatric population. Children with ASD and epilepsy often exhibit greater impairments in executive functions such as cognitive flexibility, planning, inhibition, and emotional control, as well as in language dimensions such as phonology, semantics, morphosyntax, and pragmatics. These impairments can significantly impact their maturation and development. The aim of this study was to assess and compare the executive functioning and language skills of 150 participants, divided into three groups: one with ASD only, another with epilepsy only, and the third group with both ASD and epilepsy. The study utilized the Behavior Rating Inventory of Executive Function (BRIEF-2) and Neuropsychological Evaluation of Executive Functions in Children (ENFEN) to assess executive functions, and Clinical Evaluation of Language Fundamentals 5 (CELF-5) to evaluate language skills. The results indicated that participants with this comorbidity had lower scores in both executive functioning and language skills compared to children with only ASD or epilepsy. The presence of epilepsy significantly limits the executive and linguistic performance of children with ASD, negatively affecting language acquisition, functionality, and the ability to carry out basic life activities independently.