The title of this TV episode Meet Me in Daegu, is homage to the title of the Judy Garland Meet Me in St. Louis (1950) which is playing early on in the episode in the background.
The song the band is signing at the bar early in the episode is "Bésame mucho", a famous song written by the Mexican composer Consuelito Velazquez in 1940.
When Ji-Ah and her umma visit the shaman, the off screen voice is from a tape recording of Judy Garland. Garland made the recordings for an autobiography that was never completed.
Apart from an occasional stray sentence in English, virtually all the dialogue is in Korean with subtitles until around the 27-minute mark, when Atticus shows up.