I live in south central Wisconsin and I am familiar with the the local towns that have strong ethnic origins:

Jefferson WI: German
Watertown WI: German
New Glarus WI: Swiss
Stoughton WI: Norwegian
Parts of Milwaukee WI: Poish
Mount Horeb WI: Norwegian/ Finnish

I have not seen any Polish scribed barns...but I wouldn't say no to an invitation.

Thanks,

Rooster

Yah-fur-sur, You-betcha, Don't-cha-know!