The learners of Korean as a foreign language are influenced widely by their mother languages. Each learner, of course, has different difficulties in learning Korean. It can be said that mother languages of the learners decide the degrees of the difficulties in Korean language acquisition. This study aims to research the types of errors in Korean composition of Vietnamese students, especially in spelling, words, and grammar. The research found that Vietnamese students make errors mainly in spelling, words, and grammar which have different structures and forms with Vietnamese. (Yeungnam University)
