A question from @farizatoy‘s tweet ” lenggang kankung ” – kenapa kangkung ea? kenapa x lenggang sawi ke lenggang bayam ke lenggang kailan masak ikan masin ke..kan?”
So here’s the answer
The lyrics of Lenggang Kangkung is based on the format of a pantun. The first two lines of the pantuns and have no other purpose than to set up a sound and rhyme pattern for the second couplet. The second couplet is the only meaningful part of a pantun.
Lenggang, lenggang kangkung
Kangkung tepi telaga
Balik dari menyabung
Makan nasi lauk tak ada.
Lenggang, lenggang kangkung
Kangkung berbatas-batas
Kalau orangnya sombong
Satu hari mendapat balas.
Lenggang, lenggang kangkung
Kangkung berjela-jela
Hati bongkak dan sombong
Itu bukan pakalan kita.
Source : http://thatbottle.blogspot.com/2005/11/lenggang-kangkung.html & http://www.cyloong.com/Multicultural/SEA.html

