Except that there is a Slavic continuum. The spoken language of the border is Polish if written in the (catholic) Latin-derived script and (orthodox) Belorussia

Except that there is a Slavic continuum. The spoken language of the border is Polish if written in the (catholic) Latin-derived script and (orthodox) Belorussian if written in Cyrillic or a (muslim) Polish Tartar if written in the Arabic script - which was still being used until the 1980s in that corner of the world - likewise Polish/Ukrainian and Polish/Czech