The restaurant will be based in Sheffield, UK, and the aim of the restaurant is to give brits an understanding of polish traditions and culture
I think that this will be difficult to do on a daily basis. I think that the most you can hope for is to cook traditional Polish dishes daily.
There are, of course many traditions and customs but I don't think you can apply them to daily living. More likely that they would be "special occasions".
However, plenty threads here about culture and of course, recipes.
Why do you pick Sheffield specifically?