Korean (한국어) is the main language. In tourist areas like Seongsu or Myeongdeong, you see English signs and menus, but in local neighborhoods, it’s strictly Korean!
Korean Won (KRW). $1 USD is about 1,350 Won. It sounds like a lot, but it's their version of our $1.00.
About 1,000 Won ($0.75). Very cheap!
Spicy Pad Siew Beef ("Pad See You", it means stir-fry and soy sauce) in Seongsu. It is a beef stir-fried noodle dish from Thailand and it was from a "hole-in-the-wall" place. It was super spicy but delicious!
I listened to K-Pop, of course, especially the BTS tracks from their new album, "Arirang."