"Dad was born in Czechia and Mom in Slovakia."

Translation: Táta se narodil v Česku a máma na Slovensku.

[Steve254604]

I might be missing something obvious, but why is this “v Česku” but “na Slovensku”?

[VladaFu]

See https://www.duolingo.com/comment/26202454

[Steve254604]

Excellent, thanks.