Czech or Slovak is a term used to refer to the people and cultures of the Czech Republic and Slovakia. Both countries are located in Central Europe and share a common language, culture, and history. The term 'SLAV' is used to refer to the people of these two countries, as well as other Slavic nations such as Poland, Russia, and Ukraine. The term is derived from the Proto-Slavic language, which was spoken by the early Slavic tribes.