- Afrikaans: Tweeling
- Albanian: Binjak
- Amharic: ጓደኛ (guadäñña)
- Arabic: توأم (taw’am)
- Armenian: Երկվորյակ (yerkvorak)
- Azerbaijani: Əkiz
- Basque: Biki
- Belarusian: Двайняты (dvajnaty)
- Bengali: যমজ (jomoj)
- Bosnian: Blizanac
- Bulgarian: Близнак (bliznak)
- Catalan: Bessó
- Cebuano: Kambal
- Chichewa: Mapasa
- Chinese (Simplified): 双胞胎 (shuāngbāotāi)
- Chinese (Traditional): 雙胞胎 (shuāngbāotāi)
- Corsican: Gemelli
- Croatian: Blizanac
- Czech: Dvojče
- Danish: Tvilling
- Dutch: Tweeling
- English: Twin
- Esperanto: Ĝemelo
- Estonian: Kaksik
- Finnish: Kaksoset
- French: Jumeau
- Galician: Xemelgo
- Georgian: ტყუპი (t’q’upi)
- German: Zwilling
- Greek: Δίδυμος (dídymos)
- Gujarati: જોડી (joḍī)
- Haitian Creole: Marasa
- Hausa: Tagwaye
- Hawaiian: Pālua
- Hebrew: תאום (te’om)
- Hindi: जुड़वां (juṛavāṁ)
- Hmong: Kivtheeb
- Hungarian: Iker
- Icelandic: Tvíburi
- Igbo: Eji ejima
- Indonesian: Kembar
- Irish: Leathchúpla
- Italian: Gemello
- Japanese: 双子 (futago)
- Javanese: Kembar
- Kannada: ಜೋಡಿ (jōḍi)
- Kazakh: Егіз (egiz)
- Khmer: កូនភ្លោះ (kaun phluah)
- Korean: 쌍둥이 (ssangdungi)
- Kurdish: Çendirik
- Kyrgyz: Эгиз (egiz)
- Lao: ຝາແຝດ (fa faed)
- Latin: Geminus
- Latvian: Dvīņi
- Lithuanian: Dvyniai
- Luxembourgish: Zwillingen
- Macedonian: Близнак (bliznak)
- Malagasy: Zokilahy
- Malay: Kembar
- Malayalam: ഇരട്ട (iraṭṭa)
- Maltese: Teżwiġ
- Maori: Māhanga
- Marathi: जुळी मुले (juḷī mule)
- Mongolian: Ихэр (ikher)
- Nepali: जुम्ल्याहा (jumlyāhā)
- Norwegian: Tvilling
- Pashto: غبرګولي (ghabargoli)
- Persian: دوقلو (doqolu)
- Polish: Bliźniak
- Portuguese: Gêmeo
- Punjabi: ਜੁੜਵਾ (juṛvā)
- Romanian: Geamăn
- Russian: Близнец (bliznets)
- Samoan: Masaga
- Scots Gaelic: Caomh-mhala
- Serbian: Близанац (blizanac)
- Sesotho: Mafahla
- Shona: Mapatya
- Sindhi: جڙيل (jaṛīl)
- Sinhala: යමළු (yamaḷu)
- Slovak: Dvojča
- Slovenian: Dvojček
- Somali: Mataano
- Spanish: Gemelo
- Sundanese: Kembar
- Swahili: Pacha
- Swedish: Tvilling
- Tajik: Егизиён (egiziyon)
- Tamil: இரட்டையர் (iraṭṭaiyar)
- Telugu: కవలలు (kavālalū)
- Thai: ฝาแฝด (fā faed)
- Turkish: İkiz
- Ukrainian: Близнюк (blyznyuk)
- Urdu: جڑواں (jaṛvāṁ)
- Uzbek: Egizak
- Vietnamese: Sinh đôi
- Welsh: Gefell
- Xhosa: Amatshatanga
- Yiddish: צווילינג (tsviling)
- Zulu: Amawele