Boroumand Jazi B, Mesgarzadeh Aghdam L, Sahavi S. Investigation of Monolingual German and Bilingual German–Persian Instruction Based on Vocabulary and Its Effect on Spoken Language. APES. 2025;3(3):1-9. Accessed October 15, 2025. https://journalapes.com/index.php/apes/article/view/87