I used to sing this song with my Korean friends. I think it could be a hundred years old. I remember some of the words, but not all..so the "words" I'm putting are out of order and transposed. And I remember part of the translation. I would really like to find the song online and re-learn it.
Here goes:
I yak so gui
To naga un
Da da da
Da da da
Mon san ui e
To na ga un
Mal op shi
Para pon da.
A tora o ra
A mot o shi na
Onul do he nun
So song e kol ryo
Mal op shi
pa ra pon da.

It's a song of lost love. He left without a word. Oh please come back.