Complex sentence: Because she doesn't know the person very well, she refers him as "Mr." The musical arrangement of the song is slightly altered and the members sing in a much higher pitch during the verses as opposed to the Korean version.
Split into simpler sentences: Because she doesn't know the person very well, she refers to him as "Mr." Although in a different language, the musical arrangement of the song has been slightly altered. Other noticeable differences are that the members sing in a much higher pitch during their own verses as opposed to the Korean version.