The term 'SLAVIC' is used to refer to the people, cultures, and languages of Eastern Europe, including Poland and the Czech Republic. The two countries are both part of the SLAVIC cultural group, which is characterized by its shared language, customs, and history. Poland and the Czech Republic have a long history of close ties, with both countries having been part of the same political union for centuries. Both countries also share a common language, with Polish and Czech being closely related.