You must be watching something else. So far I've seen Hmong, Mien, Khmu, Cambodians, Lue and they did ask for people to join in on the walk to parade throughout the field.
I' Kmhmu' lôôc jwm dôôq tooq broom rèèq loh rèèq hrñwam tèèq am riit hmaq i' an blwar yoh dqni' am an ge hla yoh tam ñuk taam smai. Gi meh 'mun greh da' Mé-ka (merika) I' slooq Greh Kmhmu' jum pi. Dqni' i' khro an Kmhmu da' Laav(Lao) am lav looq beh looq tal an bo da' hloq, an bo rôôm khraaq riit I' gi an yoh looq kaal mat an vah an vaaq yoh dqni'.
Sambay'lee ! Everybody I was very proud that you did great job , Good relationships , I also a Khamu , But I live in Laos , ( Luangprabang province ) . Happy Khmu new year ( Boungre').