Korean people use their own language, Hangeul, which is different from the English alphabet. It is considered a very scientific alphabet. So, It was designated as National Treasure in UNESCO's Memory of the world!
Noraebang are almost as common as restaurants in South Korea. At Noraebang, people can sing songs from all over the world. Whenever we have free time, like after exams are finished, we go to a singing room and let off steam.