noun
republic
A political system in which the head of state is not a monarch; often used in proper names like チェコリパブリック (Czech Republic).
フランスはリパブリックです。
France is a republic.
チェコリパブリックに行ったことがありますか。
Have you ever been to the Czech Republic?
共和国 is the standard Japanese word for 'republic', while リパブリック is a loanword used mainly in proper names or for stylistic effect.
Borrowed from English 'republic'.