เพลงลาวดวงเดือน ของ Lao. That is why named ลาวดวงเดือน. Thai was not exited yet when this song was created. โอ้ละหนอ is Lao word. Can you name one Siamese song that has this word? You can hear this word โอ้ละหนอ in Lao tradition song or lum. Also, the word moon in Siamesse is "chanh" and Lao is "deanh" เดือน. All the word in ลาวดวงเดือน is Lao word. Siam made few change to Siam word but still have Lao word in it, but forgot to rename it to Siam duang chanh.