| Sumario: | Purpose: This study aimed to explore the experience of adolescents who stutter in Iran by translating and adapting the Overall Assessment of the Speaker's Experience of Stuttering-Teens protocol for Farsi-speaking adolescents and compare the impact of stuttering on their lives with that of adolescents from other countries. Method: A rigorous translation and cross-cultural adaptation process—comprising forward and backward translation, expert committee review, and pilot testing—produced the OASES-T-F. The questionnaire was administered to 102 adolescents (51 males, 51 females) aged 12–17 years. Internal consistency was assessed via Cronbach's alpha, test–retest reliability via intraclass correlation coefficients (ICC), and impact scores were compared with published data from the USA, Australia, Sweden, and Poland. Result: The OASES-T-F demonstrated strong internal reliability (α =.82–.95) and test–retest stability (ICC =.90–.93). Domain scores for general information, reactions to stuttering, and communication difficulties were moderate and aligned with other countries' data. Notably, the quality-of-life domain yielded significantly higher impact among Iranian adolescents. Conclusion: The OASES-T-F is a valid and reliable instrument for assessing stuttering in Farsi-speaking teens. Findings suggest that Iran's cultural context amplifies stuttering's social and emotional effects. Clinicians should integrate cultural considerations into assessment and intervention plans.
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