The textbook is In korean and English.

New Yonsei Korean Vocabulary and Grammar 1-1 + Qr Code Mp3-Textbook is written in Korean; The Translation of Contents into English you'll find  in the Supplement Book/ Bonus Book inside this textbook.

New Yonsei Korean Vocabulary and Grammar 1-2 + Qr Code Mp3-Textbook is written in Korean; The Translation of Contents into English you'll find  in the Supplement Book/ Bonus Book inside this textbook.

Real-Life Korean Conversations: Intermediate includes 30 dialogues that you face in real-life. Each dialogue is 20~25 lines long, just the right length for an intermediate learner, and each line has an English translation on the adjacent page.

Real-Life Korean Conversations For Beginners includes 40 dialogues that you face in real-life. Each dialogue has an English translation, a vocabulary list, grammar exercises, and pronunciation exercises to help increase study efficacy.