Simplify the following text for a Grade 7 native English-speaking person.
Original: The Slovak koruna replaced the Czechoslovak koruna at par and was replaced by the reconstituted Czechoslovak koruna , again at par .
Simplified: It replaced the Czechoslovak Crown . Slovak koruna should not be mistaken with the Slovak koruna during the World War II ( Slovak : Koruna slovenskÃ , short Ks , notice word order )