Dear kamka,
Could you please acknowledge that Polish is a quite homogeneous language with less dialects than German, for example, because of the fact that back in the 19th century, when Poland was patite, Adam Mickiewicz standardised the Polish language, creating the literary language on the basis of the accent spoken in the region of PoznaŃ. As only the literature could then cling together the non-existing nation, the literary language gained official status soon.
Thank you.