Assalamualaikum and Salam Sejahtera.
Some people have a wrong thought on Korean music. They said, "It is just a waste to listen to those music, what for to listen to those music?" Those are some of the others thought about Korean music. They does not realize, there is something that we can learn from listening to this music. In fact, we might learn the others language automatically. See? It benefit us right? Just listen to this music, we might remember a few words and those words would always playing in our head and thus, we automatically learns Korean language. So, it is worthy to listen to other language's song. It can be said that we are killing two birds with one stone. Just have a try first and do not make a zero assumption. Below are some of the Korean word that can be easily remember(just for share):
1. wae = why
2. saengil chukhahamnida = happy birthday
3. han, du, se = one, two, three
It is same to those who have a difficulty on learning English. Just by listening to English song, we can improve our vocabulary.
p/s: correct me if i'm wrong. :)