- Afrikaans: Keltiese See
- Albanian: Deti Kelt
- Arabic: الْبَحْر الْكِلْتِيّ m (al-baḥr al-kiltiyy)
- Armenian: Կելտական ծով (Keltakan cov)
- Azerbaijani: Kelt dənizi
- Basque: Itsaso Zeltikoa
- Belarusian: Ке́льцкае мо́ра n (Kjélʹckaje móra)
- Bengali: কেল্টীয় সাগর (kelṭiẏo śagor)
- Breton: Mor Keltiek (br) m
- Bulgarian: Келтско море n (Keltsko more)
- Burmese: ဆဲလ်တစ်ပင်လယ် (hcailtacpanglai)
- Catalan: mar Cèltica f
- Chinese:
- Mandarin: 凱爾特海 / 凯尔特海 (Kǎi'ěrtèrhǎi)
- Czech: Keltské moře (cs) n
- Danish: Keltiske Hav n
- Dutch: Keltische Zee f
- Esperanto: Kelta Maro
- Estonian: Keldi meri
- Finnish: Kelttimeri
- French: mer Celtique f
- Galician: Mar Céltico m
- Georgian: კელტების ზღვა (ḳelṭebis zɣva)
- German: Keltische See f
- Greek: Κελτική θάλασσα f (Keltikí thálassa)
- Hebrew: הים הקלטי m (yam ha-kelti)
- Hindi: सेल्टिक सागर (selṭik sāgar)
- Hungarian: Kelta-tenger (hu)
- Icelandic: Keltahaf n
- Indonesian: Laut Keltik
- Irish: an Mhuir Cheilteach f
- Italian: mare Celtico m
- Japanese: ケルト海 (ja) (Keruto-kai)
- Kazakh: Кельт теңізі (Kelt teñızı)
- Khmer: សមុទ្រសែលទិក (sɑɑmutrɔɔsaeltɨk)
- Korean: 켈트해 (kelteuhae)
- Latin: Mare Verginium n
- Latvian: Ķeltu jūra f
- Lithuanian: Keltų jūra f
- Macedonian: Келтско Море n (Keltsko More)
- Malay: Laut Celtic
- Malayalam: സെൽട്ടിക് കടൽ (selṭṭikŭ kaṭal)
- Maltese: Baħar Ċeltik m
- Marathi: सेल्टिक समुद्र (selṭik samudra), केल्टिक समुद्र n (kelṭik samudra)
- Norwegian:
- Bokmål: Keltersjøen m
- Nynorsk: Keltarsjøen m
- Persian: دریای سلتی (daryâ-ye siltik)
- Polish: Morze Celtyckie (pl) n
- Portuguese: mar Celta m
- Punjabi: ਕੈਲਟਿਕ ਸਾਗਰ (kailṭik sāgar)
- Romanian: Marea Celtică f
- Russian: Ке́льтское мо́ре n (Kélʹtskoje móre)
- Serbo-Croatian:
- Cyrillic: Келтско море n
- Roman: Keltsko more n
- Slovak: Keltské more n
- Slovene: Keltsko morje n
- Spanish: mar Céltico m, mar Celta m
- Swedish: Keltiska havet n
- Tamil: செல்ட்டிக் கடல் (celṭṭik kaṭal)
- Thai: ทะเลเคลติก (tà-lee keel-dtìk)
- Turkish: Kelt Denizi
- Ukrainian: Ке́льтське мо́ре n (Kélʹtsʹke móre)
- Vietnamese: biển Celtic
- Welsh: Môr Celtaidd m
- West Frisian: Keltyske See
|