- Aari: ʔoydí
- Abaza: пщба (pśba)
- Abkhaz: ԥшьба (pšba), ҧшьба (pšba) (old spelling)
- Abon: bine
- Adyghe: плӏы (plˢʼə)
- Afar: feréy
- Afrikaans: vier (af)
- Aghwan: 𐔱𐔼𐕗 (biṗ)
- Ahom: 𑜏𑜣 (sī)
- Ainu: イネ (ine)
- Akan: anan, anang
- Aklanon: ap-at
- Albanian: katër (sq)
- Alutiiq: staaman
- American Sign Language: (4@Side-PalmBack)
- Amharic: አራት (am) (ʾärat) (numeral: ፬ (4))
- Apache:
- Arabic: أَرْبَعَة (ar) (ʔarbaʕa) (numeral: ٤ (4))
- Aragonese: quatre, quatro
- Aramaic:
- Archi: ебкъ (ebqʼ)
- Argobba: አርቢት (arbit)
- Armenian: չորս (hy) (čʿors)
- Aromanian: patru (roa-rup)
- Assamese: চাৰি (sari) (numeral: ৪)
- Asturian: cuatro (ast)
- Atong (India): byryi
- Avar: ункъо (unqxʼo), ункъго (unqxʼgo)
- Aymara: pusi (ay)
- Azerbaijani: dörd (az)
- Balinese: patpat, empat
- Banjarese: ampat
- Bashkir: дүрт (dürt)
- Basque: lau (eu)
- Bassa: hĩinyɛ
- Bay Miwok: huya
- Belarusian: чаты́ры (be) (čatýry), (collective) чацвёра (čacvjóra)
- Bengali: চার (bn) (car) (numeral: ৪)
- Biatah Bidayuh: pat
- Big Nambas: iv'a
- Bikol Central: apat (bcl)
- Bislama: fo
- Bouyei: sis
- Breton: pevar (br) m, peder (br) f
- Brunei Malay: ampat
- Budukh: йукьуд (juqʼud)
- Buginese: eppa
- Bulgarian: че́тири (bg) (čétiri)
- Burmese: လေး (my) (le:) (numeral: ၄ (my) (4))
- Buryat: дүрбэн (dürben)
- Calamian Tagbanwa: epat
- Casiguran Dumagat Agta: epat
- Catalan: quatre (ca)
- Cebuano: upat
- Central Atlas Tamazight: ⴽⴽⵓⵥ (kkuẓ)
- Central Bontoc: epat
- Central Dusun: apat
- Central Sierra Miwok: ˀój·is·a-
- Chakma: 𑄬𑄌𑄃𑄨𑄢𑄴 (ce-ir), 𑄺 (4)
- Chamicuro: ma'pojtamala
- Chechen: диъ (diʔ)
- Chepang: प्लय् (play)
- Cherokee: ᏅᎩ (nvgi)
- Chichewa: nayi
- Chinese:
- Cantonese: 四 (yue) (sei3)
- Dungan: сы (sɨ)
- Hakka: 四 (siì)
- Mandarin: 四 (zh) (sì) (numeral: 肆)
- Min Dong: 四 (sei)
- Min Nan: (Xiamen) 四 (zh-min-nan) (sì, sù), (Teochew) 四 (zh-min-nan) (si3)
- Old Chinese: 亖 (*hljids)
- Wu: 四 (sr)
- Chinook Jargon: lakit
- Chukchi: ӈыраӄ (ṇyraq)
- Chuukese: ruanu, föchö, fömön
- Chuvash: тӑваттӑ (tăvattă)
- Cornish: peswar m, peder f
- Corsican: quattru (co)
- Cowlitz: mús
- Cree: newo
- Crimean Tatar: dört
- Czech: čtyři (cs), (collective) čtvery
- Danish: fire (da)
- Dena'ina: dink'i
- Dhivehi: ޖަތަރު (jataru)
- Dolgan: түөрт
- Drung: vbli
- Dutch: vier (nl)
- Dzongkha: བཞི (bzhi )
- Eastern Cham: ꨛꨩꩀ (ppa'k)
- Eastern Mari: нылыт (nylyt)
- Embaloh: ampat
- Erzya: ниле (ńiľe)
- Esperanto: kvar (eo)
- Estonian: neli (et)
- Even: дигэн (ʒigən)
- Evenki: дыгин (digin)
- Extremaduran: cuatru
- Faroese: fýra (fo)
- Fataluku: fate
- Fijian: va (fj)
- Finnish: neljä (fi)
- French: quatre (fr)
- Friulian: cuatri
- Ga: ejwɛ
- Galician: catro (gl)
- Garifuna: gádürü
- Ge'ez: አርባዕቱ m (ʾärbaʿtu), አርባዕ f (ʾärbaʿ) (numeral: ፬ (4))
- Georgian: ოთხი (ka) (otxi)
- German: vier (de)
- Gilbertese: aua
- Gothic: 𐍆𐌹𐌳𐍅𐍉𐍂 (fidwōr)
- Greek: τέσσερα (el) (téssera), δ΄ (numeral)
- Greenlandic: sisamat (kl)
- Guaraní: irundy
- Gujarati: ચાર (gu) (cār) (numeral: ૪)
- Hadza: bone and inflections
- Haitian Creole: kat
- Hanunoo: upat, ᜢᜩ (upat)
- Hausa: huɗu
- Hawaiian: hā, ʻehā
- Hebrew: אַרְבַּע (he) f (arbá) (used in counting), אַרְבָּעָה (he) m (arbaá)
- Higaonon: ha-apat
- Hindi: चार (hi) (cār) (numeral: ४), चतुर (hi) (catur), चहार (hi) (cahār)
- Hiri Motu: hani
- Hlai: caus
- Hopi: naalöyöʼ
- Hungarian: négy (hu)
- Hunsrik: fier
- Iban: empat, pat
- Ibanag: appat
- Icelandic: fjórir (is) m, fjórar (is) f, fjögur (is) n
- Icelandic Sign Language: 4@Side-PalmBackFingerUp
- Ido: quar (io)
- Igbo: anọ (ig)
- Ilocano: uppat
- Indonesian: empat (id)
- Ingrian: neljä
- Interlingua: quatro (ia)
- Iranun: pat
- Irish: ceathair (ga), ceithre
- Isnag: appat
- Istriot: quatro, quattro
- Istro-Romanian: påtru
- Italian: quattro (it) m
- Itawit: appat
- Iu Mien: biei
- Japanese: 四 (ja) (yon, shi), 四つ (ja) (yottsu)
- Jarai: pă
- Javanese: papat (jv), pat (jv)
- Jurchen: duwin
- Kabardian: плӏы (plˢʼə)
- Kabuverdianu: kuátu
- Kalmyk: дөрвн (dörvn)
- Kannada: ನಾಲ್ಕು (kn) (nālku) (numeral: ೪ (kn) (4))
- Kanuri: dege
- Karachay-Balkar: тёрт (tört)
- Karaim: diort’
- Karakhanid: تُورْتْ (tȫrt)
- Karelian: nelʹlʹä
- Karo Batak: empat
- Kashubian: sztërë
- Kaurna: yarapurla
- Kazakh: төрт (kk) (tört)
- Khakas: тӧрт
- Khanty: (Kazym) няԓ (nâḷ)
- Khmer: បួន (km) (buən) (numeral: ៤ (4))
- Komi-Permyak: нёль (ňoľ)
- Komi-Zyrian: нёль (ňoľ)
- Kongo: yiya
- Korean: 넷 (ko) (net), 네 (ko) (ne) (attributive), 사(四) (ko) (sa)
- Kumyk: дёрт (dört)
- Kurdish:
- Central Kurdish: چوار (ckb) (çwar)
- Northern Kurdish: çar (ku)
- Kven: nelje
- Kyrgyz: төрт (ky) (tört)
- Ladin: cater
- Lakota: tópa
- Lao: ສີ່ (sī) (numeral: ໔ (4))
- Latgalian: četri m, četrys f
- Latin: quattuor (la)
- Latvian: četri (lv) m, četras f
- Laz: ოთხო (otxo)
- Lenape:
- Lezgi: кьуд (q̇ud)
- Ligurian: quàttro m
- Lithuanian: keturi (lt) m, keturios f
- Livonian: nēļa
- Lombard: cuàter (quàter)
- Louisiana Creole French: kat
- Low German:
- Dutch Low Saxon: veer (nds)
- German Low German: veer (nds)
- Lun Bawang: afaat
- Lusitanian: petranioi
- Luxembourgish: véier (lb)
- Lü: ᦉᦲᧈ (ṡii¹) (numeral: ᧔)
- Macedonian: четири (mk) (četiri)
- Madurese: empaʔ, empak
- Maguindanao: pat
- Makasar: appaʔ
- Malay:
- Malayalam: നാലു (nālu), നാല് (ml) (nālŭ) (numeral: ൪)
- Maltese: erbgħa (mt)
- Manchu: ᡩᡠᡳᠨ (duin)
- Mandar: appeʔ
- Mangarevan: ha
- Mansaka: opat
- Mansi: нила (nila)
- Manx: kiare
- Maori: whā
- Maranao: pat
- Marathi: चार (cār) (numeral: ४)
- Maricopa: tcumpopk
- Marshallese: emān
- Mauritian Creole: kat
- Mazanderani: چار (čār)
- Megleno-Romanian: patru
- Middle English: four
- Minangkabau: ampeʔ, ampek
- Mingrelian: ოთხი (otxi)
- Mirandese: quatro
- Mizo: pa-li
- Moksha: ниле (ńiľe)
- Mon: ပန် (pɔn)
- Mongolian:
- Cyrillic: дөрөв (mn) (döröv)
- Mongolian: ᠳᠥᠷᠪᠡ (dörbe), ᠔ (4) (numeral)
- Montagnais: neu
- Motu: hani
- Mulam: ti⁵ (Dongmen, Siba)
- Muna: paa
- Muong: pổn
- Mòcheno: viar
- Nahuatl: nahui (nah)
- Nama: haka
- Nanai: дуин
- Nauruan: aeoq
- Navajo: dį́į́ʼ
- Negidal: диғин
- Nepali: चार (ne) (cār) (numeral: ४)
- Newar: पी (pī)
- Ngazidja Comorian: -ne
- Nias: õfa
- Niuean: fa, fā
- Nivkh: нырӈ (nərŋ)
- North Frisian:
- Northern Ohlone: uṯit
- Northern Thai: ᩈᩦ᩵
- Norwegian: fire (no)
- O'odham: giʼik
- Occitan: quatre (oc)
- Ojibwe: niiwin
- Okinawan: 四 (yū), 四ち (yūchi)
- Old Church Slavonic:
- Cyrillic: четꙑре (četyre) (numeral: д҃)
- Old English: feower
- Old Frisian: fiūwer
- Old Japanese: 四 (yo2)
- Old Javanese: pat
- Old Norse: fjórir
- Old Turkic: 𐱅𐰇𐰼𐱅 (t²ür²t² /tört/)
- Oriya: ଚାରି (or) (cari) (numeral: ୪)
- Oromo: afur
- Oscan: 𐌐𐌄𐌕𐌖𐌓𐌀 (petura)
- Ossetian: цыппар (cyppar)
- Ottoman Turkish: درت (dört)
- Pa'o Karen: လစ်ꩻ
- Pacoh: poan
- Palawan Batak: epat
- Pamona: opo
- Papiamentu: kuater
- Pashto: څلور (ps) (calor)
- Pennsylvania German: fiah, fierra, vier
- Persian: چهار (fa) (čahâr) (numeral: ۴)
- Piedmontese: quatr
- Pijin: foa
- Pipil: nawi, nahui
- Polish: cztery (pl), (collective) czworo (pl)
- Portuguese: quatro (pt)
- Punjabi: ਚਾਰ (cār) (numeral: ੪ (4))
- Purepecha: t'ámu
- Quechua: tawa (qu), cusku
- Rapa Nui: ha
- Rarotongan: ā
- Rohingya: sair
- Romagnol: cvàtar
- Romani: śtar
- Kalo Finnish Romani: staar
- Romanian: patru (ro)
- Romansch: quatter, quater
- Russian: четы́ре (ru) (četýre)
- Rusyn: штири (štyry)
- S'gaw Karen: လွံၢ် (lwee̱)
- Saho: afar
- Sami:
- Samoan: fā
- Samogitian: ketori
- Sangir: epaʔ
- Sango: osïö (sg)
- Sanskrit: चतुर् (sa) (catur)
- Santali: ᱯᱳᱱ (pon), ᱯᱩᱱ (pun )
- Sarcee: diitc'íí
- Sardinian: batero, baturu, bàtoro, batro, quatru
- Campidanese: cuattru
- Logudorese: báttor
- Sasak: empat
- Saterland Frisian: fjauer
- Scots: fower
- Scottish Gaelic: ceithir, (persons) ceathrar m
- Serbo-Croatian:
- Seychellois Creole: kat
- Shan: သီႇ (shn) (sìi) (numeral: ႔)
- Sherpa: བཞི (bzhi)
- Shor: тӧрт
- Sichuan Yi: ꇖ (ly)
- Sicilian: quattru (scn)
- Sidamo: shoole
- Sikkimese: ཞི (zhi)
- Silesian: štyry
- Simeulue: at
- Sindhi: چار (sd) (čār)
- Sinhalese: හතර (si) (hatara)
- Slovak: štyri (sk), štyria m anim, štvoro
- Slovene: štírje, (when counting) štíri (sl)
- Slovincian: štė̂řä
- Solon: diḡing
- Somali: afar (so)
- Sorbian:
- Southern Altai: тӧрт (tört)
- Southern Ohlone: utsit
- Spanish: cuatro (es)
- Sranan Tongo: fo
- Sukuma: ine
- Sundanese: opat (su)
- Swahili: nne (sw)
- Swazi: ne
- Swedish: fyra (sv)
- Tabasaran: юкьуб (juq̇ub)
- Tagalog: apat (tl)
- Tahitian: māha, maha
- Tai Dam: ꪎꪲ꪿
- Tai Nüa: ᥔᥤᥱ (sǐ)
- Tajik: чор (tg) (čor)
- Tamil: நான்கு (ta) (nāṉku) (numeral: ௪ (ta))
- Tangut: 𗥃 (*ljɨr¹)
- Taos: wíaną
- Tarantino: quatte
- Tashelhit: koz m, kozt f
- Tatar: дүрт (tt) (dürt)
- Tausug: upat
- Tboli: fat
- Tedim Chin: li
- Telugu: నాలుగు (te) (nālugu) (numeral: ౪ (te) (4))
- Ternate: raha
- Tetum: haat
- Thai: สี่ (th) (sìi) (numeral: ๔ (th) (4))
- Tibetan: བཞི (bzhi) (numeral: ༤ (4))
- Tidore: raha
- Tigre: አርበዕ (ʾärbäʿ) (numeral: ፬ (4))
- Tigrinya: ኣርባዕተ (ti) (ʾarbaʿtä) (numeral: ፬ (4))
- Timugon Murut: apat
- Tiruray: efot
- Toba Batak: opat
- Tocharian A: śtwar
- Tocharian B: śtwer
- Tok Pisin: fopela
- Tontemboan: epat
- Tundra Nenets: тет (tyet°)
- Tupinambá: irundyk, oîoîrundyk
- Turkish: dört (tr)
- Turkmen: dört (tk)
- Tuvaluan: fa
- Tuvan: дөрт (dört)
- Tuwali Ifugao: opát
- Tz'utujil: kikhi
- Udmurt: ньыль (ňyľ)
- Ukrainian: чоти́ри (uk) (čotýry), (collective) че́тверо (čétvero)
- Uma: opoʔ
- Umbrian: 𐌐𐌄𐌕𐌖𐌓 (petur)
- Urdu: چار (cār)
- Uyghur: تۆت (ug) (töt)
- Uzbek: toʻrt (uz)
- Venetian: quatro
- Veps: nel'l'
- Vietnamese: bốn (vi)
- Vilamovian: fiyr
- Volapük: fol (vo)
- Votic: nelʹlʹe
- Võro: nelli
- Walloon: cwate (wa)
- Waray-Waray: upat
- Welsh: pedwar (cy) m, pedair (cy) f
- West Coast Bajau: empat
- West Frisian: fjouwer (fy)
- West Makian: fati
- Western Bukidnon Manobo: upat
- Western Cham: ڤآء
- Western Kayah: ꤜꤝꤟꤤ꤭ (lwī̤)
- White Hmong: plaub
- Winnebago: joop
- Wiradhuri: bula bula
- Wolio: apa
- Wolof: ñeent
- Wutunhua: se
- Xhosa: ne
- Yagara: budela-budela, burla burla
- Yagnobi: туфор (tufor)
- Yakan: ampat
- Yakkha: ना
- Yakut: түөрт (tüört)
- Yao: mcheche
- Yiddish: פֿיר (fir)
- Yoruba: mẹ́rin, ẹ̀rin
- Yup'ik: cetaman
- Yámana: kupakunu
- Zazaki: çexar
- Zealandic: vier, viere (in counting)
- Zhuang: seiq (Sawndip 四)
- Zou: li
- Zulu: ne
- Zuni: a:wide
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