- Abkhaz: адельфин (adelʲfin), амшынҳәа (amŝənḥʷa)
- Adyghe: хыкъо (xəqʷo), псыкъу (psəqʷu)
- Afrikaans: dolfyn (af)
- Ainu: オコㇺ (okom), タンヌ (tannu), トゥワユㇰ (tuwayuk)
- Albanian: delfin (sq)
- Arabic: دُلْفِين m (dulfīn), دَرْفِيل m (darfīl), دُخَس m (duḵas)
- Aragonese: dalfín m
- Armenian: դելֆին (hy) (delfin)
- Old Armenian: դելփին (delpʻin)
- Assamese: শিহু (xihu), উলুপী (ulupi)
- Assyrian Neo-Aramaic: ܕܹܠܦܝܼܢܵܐ m (delpīna)
- Asturian: toliña (ast) f, golfín (ast) m, llofín (ast) m
- Azerbaijani: delfin (az)
- Basque: izurde (eu)
- Belarusian: дэльфі́н m (delʹfín)
- Bengali: ডলফিন (bn) (ḍolphin)
- Bikol Central: lumod (bcl)
- Breton: delfin m, beg-hir (br) m
- Bulgarian: делфи́н (bg) m (delfín)
- Burmese: လင်းပိုင် (my) (lang:puing)
- Catalan: dofí (ca) m
- Central Atlas Tamazight: ⴰⵣⵢⴰⵎ (azyam)
- Central Melanau: belusok
- Chamicuro: walali
- Cherokee: ᏗᏁᏍᏆᏕᎩ (dinesquadegi)
- Chinese:
- Cantonese: 海豚 (hoi2 tyun4)
- Hakka: 海豚 (hói-thùn)
- Hokkien: 海豬/海猪 (zh-min-nan) (hái-ti, hái-tu), 海豬仔/海猪仔 (hái-ti-á, hái-tu-á), 海豚 (zh-min-nan) (hái-thûn), 海鼠 (hái-chhú) (Magong), 鯃魚/鯃鱼 (gô͘-hî, gô͘-hû), 海徛 (hái-khiā), 海鰡/海𱈊 (hái-liu), 烏鯃/乌鯃 (o͘-ngô͘), 白鯃 (pe̍h-gô͘, pe̍h-ngô͘), 白鰗/白𬶞 (pe̍h-kô͘)
- Mandarin: 海豚 (zh) (hǎitún), 海豬/海猪 (zh) (hǎizhū), 海豨 (zh) (hǎixī) (literary)
- Wu: 海豚 (5he-den)
- Cornish: pyffyer m, morhogh m
- Crimean Tatar: yunus balığı
- Czech: plískavice f, delfín (cs) m
- Danish: delfin (da)
- Dutch: dolfijn (nl) m
- Egyptian: (please verify) (sjn n wꜣḏ-wr m)
- Esperanto: delfeno m
- Estonian: delfiin (et)
- Faroese: springari m, delfin f
- Finnish: delfiini (fi)
- French: dauphin (fr) m
- Galician: golfiño (gl) m, touliña f
- Georgian: დელფინი (delpini)
- Old Georgian: დელფინი (delpini)
- German: Delphin (de) m, Delfin (de) m
- Greek: δελφίνι (el) n (delfíni)
- Ancient: δελφίν m (delphín), δελφίς f (delphís)
- Greenlandic: aarluarsuk
- Guaraní: guayraka
- Gujarati: શિશુમાર n (śiśumār)
- Haitian Creole: dofen
- Hawaiian: hoikiuna
- Hebrew: דּוֹלְפִין (he) m (dólfin)
- Hindi: सूंस m (sūns) (also porpoise), डॉल्फ़िन (ḍŏlfin)
- Hungarian: delfin (hu)
- Icelandic: höfrungur (is)
- Indonesian: lumba-lumba (id)
- Interlingua: delphino
- Irish: deilf
- Istriot: dulfeîn m
- Italian: delfino (it) m
- Japanese: 海豚 (ja) (いるか, iruka), イルカ (ja) (iruka)
- Javanese: lumba-lumba
- Kabardian: хыкхъуэ (kbd) (xəqχʷɛ)
- Kabyle: azyam
- Kazakh: дельфин (delfin)
- Khmer: ផ្សោត (km) (phsaot)
- Kikai: 海豚 (ふぃとぅ, fitu, ぴとぅ, pitu)
- Korean: 돌고래 (ko) (dolgorae)
- Kunigami: 海豚 (ひーとぅい, hiitui)
- Kyrgyz: дельфин (ky) (delfin)
- Lao: ປາເດິນຟິນ (lo) (pā dœn fin), ປາໂລມາ (pā lō mā), ເດິນຟິນ (dœn fin), ໂລມາ (lō mā), ໝູທະເລ (mū tha lē)
- Latin: delphīnus (la) m
- Latvian: delfīns m
- Laz: delpina
- Lithuanian: delfinas (lt) m
- Low German:
- German Low German: Meerswien (nds) n, Swienfisch m
- Macedonian: делфин m (delfin)
- Malagasy: feso (mg)
- Malay: lumba-lumba
- Malayalam: ഏടി (ml) (ēṭi)
- Maltese: delfini
- Manchu: ᠨᠠᠮᡠ
ᡠᠯᡤᡳᠶᠠᠨ (namu ulgiyan)
- Mansaka: lomba
- Manx: doraid
- Maori: aihe
- Middle English: delphyn, mereswyn
- Mongolian: далайн гахай (dalajn gaxaj)
- Navajo: tééh hóyáanii
- Nivkh: поми (pomi)
- Norman: dauphîn m
- Northern Amami-Oshima: 海豚 (ふとぅ, futu)
- Norwegian:
- Bokmål: delfin m
- Nynorsk: delfin m
- Occitan: dalfin (oc) m
- Okinawan: 海豚 (ふぃーとぅ, fiitu)
- Old English: mereswīn n
- Ottoman Turkish: یونس بالغی (yunus balığı)
- Papiamentu: dòlfein
- Persian: دلفین (fa) (dolfin), خوکماهی (xuk-mâhi)
- Polish: delfin (pl) m
- Portuguese: golfinho (pt) m, delfim (pt) m
- Quechua: phujpuri
- Romagnol: dilfòin m
- Romanian: delfin (ro) m
- Romansch: delfin
- Russian: дельфи́н (ru) m (delʹfín)
- Samoan: masimasi (sm)
- Sardinian: gorfinu, grufinu, gurfinu
- Scots: dowphin
- Scottish Gaelic: leumadair m, bèist-ghorm f, deilf f, muc-bhiorach f
- Serbo-Croatian:
- Cyrillic: дупин m, делфин m, плискавица f
- Roman: dupin (sh) m, delfin (sh) m, pliskavica (sh) f
- Sicilian: derfinu (scn) m, dirfinu (scn), derfinu (scn), draffinu (scn), darfinu (scn)
- Sinhalese: ඩොල්ෆින් (ḍolfin)
- Slovak: delfín (sk) m
- Slovene: delfin (sl) m
- Somali: hoombarada
- Southern Amami-Oshima: 海豚 (ふとぅ, futu)
- Spanish: delfín (es) m
- Sranan Tongo: profosu
- Sundanese: ᮜᮥᮙ᮪ᮘᮜᮥᮙ᮪ᮘ (lumbalumba)
- Swahili: pomboo
- Swedish: delfin (sv) c
- Tagalog: lumba-lumba, lumbalumba
- Tahitian: please add this translation if you can
- Tajik: делфин (delfin)
- Tamil: ஓங்கில் (ta) (ōṅkil)
- Ternate: kohia, kahia
- Thai: โลมา (th) (loo-maa), ปลาโลมา (bplaa loo-maa)
- Tibetan: མཚོ་ཕག (mtsho phag)
- Tidore: kahia
- Tigrinya: ኣቡ ሰላማ (ʾabu sälama)
- Tongan: please add this translation if you can
- Turkish: yunus (tr), delfin (tr), ırgay
- Turkmen: delfin
- Ugaritic: 𐎀𐎐𐎃𐎗 (ảnḫr)
- Ukrainian: дельфі́н m (delʹfín)
- Urdu: ڈالفن (ḍolfin)
- Uyghur: دېلفىن (dëlfin)
- Uzbek: delfin (uz)
- Venetian: dolfin (vec), delfin
- Vietnamese: cá heo (vi)
- Welsh: dolffin (cy) m
- West Frisian: dolfin
- Yámana: sauyánux
- Yanyuwa: miriyi
- Yiddish: דעלפֿין m (delfin)
- Zulu: ihlengethwa (zu)
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