Proto-Slavic *porgъ

→ Belarusian парог (inherited)

→ Bulgarian праг (inherited)

→ Czech práh (inherited)

→ Old Church Slavonic прагъ (inherited)

→ Lower Sorbian prog (inherited)

→ Upper Sorbian próh (inherited)

→ Macedonian праг (inherited)

→ Norwegian Bokmål Praha (derived)

→ Polabian porg (inherited)

→ Romanian prag (derived)

→ Russian порог (inherited)

→ Serbo-Croatian праг (inherited)

→ Serbo-Croatian prag (inherited)

→ Slovak prah (inherited)

→ Albanian prag (derived)

→ Ukrainian поріг (inherited)

→ Old Czech práh (inherited)