ぬ in place of の The lyrics of the song go like this: > > > > > **** Why is used where is expected? It this something Okinawan?

According to Wikipedia :

> ###
>
> **u** i
>
> ###
>
> ****

So yes, in Okinawan is basically the same word as , although it has some grammar rules that are different from those of mainland Japanese. Some pages say this type of is almost dead now, and, for the most part, the lyrics are written in standard Japanese. So this may be seen as an archaism.