- Albanian: Çeko-Sllovaki
- Belarusian: Чэха-Славакія f (Čexa-Slovákija)
- Bulgarian: Чехо-Словакия f (Čexo-Slovákija)
- Czech: Česko-Slovensko n
- Danish: Tjekko-Slovakiet
- Dutch: Tsjecho-Slowakije (nl)
- Esperanto: Ĉeĥo-Slovakio
- Estonian: Tšehho-Slovakkia
- Finnish: Tšekko-Slovakia
- French: Tchéco-Slovaquie f
- German: Tschecho-Slowakei (de) f
- Greek: Τσεχο-Σλοβακία f (Tsecho-Slovakía)
- Hungarian: Cseh-Szlovákia
- Irish: an tSeic-Slóvaic f
- Italian: Ceco-Slovacchia f
- Macedonian: Чехо-Словачка f (Čeho-Slóvačka)
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- Norwegian: Tsjekko-Slovakia
- Polish: Czecho-Słowacja (pl) f
- Portuguese: Tcheco-Slováquia f, Checo-Slováquia f
- Romanian: Ceho-Slovacia f
- Ruthenian: Чесько-Словеньско n (Čés'ko-Slovéns'ko)
- Russian: Чехо-Слова́кия f (Čexo-Slovákija)
- Serbo-Croatian:
- Cyrillic: Чехо-Сло̀ва̄чка f
- Roman: Čeho-Slòvāčkā f
- Slovak: Česko-Slovensko n
- Slovene: Čéško-Slováška f
- Spanish: Checo-Slovaquia f
- Swahili: Cheko-Slovakia, Ucheko-Slovaki
- Swedish: Tjecko-Slovakien n
- Turkish: Çeko-Slovakya
- Ukrainian: Чехо-Словаччина f (Čexo-Slováččyna)
- Vietnamese: Tiệp Khắc
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