"Where were you born, in Bohemia or in Moravia?"
Translation:Kde ses narodila ty, v Čechách nebo na Moravě?
I thought the "ach" ending was locative plural? Bohemia needs to be plural in this sentence?
Sorry, you are asking about the plural. Čechy is plural, it does not have any singular. Many countries are plural, like the Low Countries=the Netherlands.