Nguyen TT, Pham TNL, Nguyen TH, Phan DBC, Duong ML. INFLUENCE OF ENGLISH PROFICIENCY ON KOREAN LANGUAGE LEARNING: A CASE STUDY AT THE FACULTY OF KOREAN LANGUAGE AND CULTURE, VNU UNIVERSITY OF LANGUAGES AND INTERNATIONAL STUDIES. JFS. 2026;42(3):151-166. doi:10.63023/2525-2445/jfs.ulis.5606