Korean and English. There is a big Chinese population too. Signs are typically written in Korean, with English, Chinese, and Japanese written below.
The currency used here is the Korean won. KRW ₩.
A bottle of water costs about 800-2000 won, which is to say cheaper than in the U.S. There are also usually buy-one-get-one deals in convenience stores.
The best meal I had this week was jokbal with a vegetable platter. The vegetable platter also had a kimchi ball that was the best kimchi I've had yet! It was very delicious and rich in flavor!
This week I listened to my own taste in music, which consists of lots of indie rock, punk and pop. I also hear lots of Korean pop while out in the streets and at school. NewJeans is a very popular and new Korean band that has songs playing all over Seoul. I also enjoy their music.