Okinawa accent

One of my Japanese friend told me that there is one confusing sentence that Okinawa people say.

When Okinawa people say,

"blah blah blah SHIMASHOUNE"

That means 

"Let's do blah blah!" in most Japanese places.

But in Okinawa, when people say  

"blah blah blah SHIMASHOUNE"

That means

"Would you like to do blah?"

Totally different.

I just found it interesting and want to share with someone who is interested.