- Afrikaans: twee (af)
- Ainu: ツ゜ (tu)
- Albanian: dy (sq)
- Alutiiq: mal'uk
- American Sign Language:

- Amharic: ሁለት (am) (hulät) (numeral: ፪ (am))
- Amuzgo: bè
- Arabic: اثنان (ar) (’ithnaan), (numeral: ٢ (ar))
- Egyptian: اتنين (’itneen)
- Moroccan: جوج (ar) (žūž)
- Aragonese: dos (an)
- Aramaic:
- Syriac: ܬܪܝܢ (trēn) m, ܬܪܬܝܢ (tartēn) f
- Hebrew: תרין (trēn) m, תרתין (tartēn) f
- Armenian: երկու (hy) (erku), երկուս (hy) (erkus)
- Aromanian: doi (rup)
- Assamese: দুই (as) (dui)
- Asturian: dos (ast)
- Aymara: paya (ay)
- Azeri: iki (az)
- Balinese: dadua
- Bashkir: ике (ike)
- Basque: bi (eu)
- Belarusian: два (be) (dva) m
- Bengali: দুই (bn) (dui) (numeral: ২ (bn))
- Breton: daou (br) m, div (br) f
- Bulgarian: две (bg) (dve)
- Burmese: နှစ် (my) (hnit) (numeral: ၂ (my))
- Catalan: dos (ca) m, dues (ca) f
- Central Atlas Tamazight: ⵙⵉⵏ (sin) m
- Chamicuro: ma'pojta
- Chechen: шиъ (ši’)
- Cherokee: ᏔᎵ (chr) (tali)
- Chichewa: wiri
- Chinese:
- Bai: 二 (ko)
- Cantonese: 二 (yi6), 两
- Gan: 二 (ě)
- Hakka: please add this translation if you can
- Mandarin: 二 (cmn) (èr), 两 (cmn) (liǎng) (numeral: 貳)
- Min Bei: 二 (ni)
- Min Dong: 两 (lang)
- Teochew: ri6, no6
- Wu: 二 (lia)
- Cornish: dew (kw) m, diw (kw) f
- Corsican: dui (co)
- Crimean Tatar: eki
- Czech: dva (cs), dvě (cs)
- Dalmatian: doi
- Danish: to (da)
- Dena'ina: nutiha
- Dolgan: икки (ikki)
- Dutch: twee (nl)
- Erzya: кавто (kavto)
- Esperanto: du (eo), dua (eo) (2)
- Estonian: kaks (et)
- Faroese: tveir (fo) m, tvær (fo) f, tvey (fo) n
- Fijian: rua (fj)
- Finnish: kaksi (fi)
- French: deux (fr)
- Friulian: doi, dôs
- Ga: enyɔ̃, enyɔ
- Galician: dous (gl), dúas (gl) f
- Garífuna: biñá, biama, bián
- Georgian: ორი (ka) (ori)
- German: zwei (de), zwo (de)
- Gothic: 𐍄𐍅𐌰𐌹 (twai)
- Greek: δύο (el) (dýo)
- Greenlandic: marluk (kl)
- Guaraní: mokõi (gn)
- Gujarati: બગડો (gu) (bagaḍo) (numeral: ૨ (gu))
- Haitian Creole: de
- Hausa: please add this translation if you can
- Hawaiian: lua, ʻelua
- Hebrew: שתיים (he) (štáyim) f (used for numbering), שניים (he) (šnáyim) m
- Hindi: दो (hi) (do) (numeral: २ (hi))
- Hopi: lööyöʼ
- Hungarian: kettő (hu), két (hu)
- Icelandic: tveir (is) m, tvær (is) f, tvö (is) n
- Ido: du (io)
- Ilocano: dua
- Indonesian: dua (id)
- Interlingua: duo (ia)
- Irish: dó (ga), (when counting objects) dhá (ga), (when counting people) beirt (ga)
- Old Irish: dá
- Italian: due (it)
- Japanese: 二 (ja) (に, ni), 二つ (ja) (ふたつ, futatsu), 2 (ja)
- Javanese: loro (jv)
- Kannada: ಎರಡು (kn) (eraḍu) (numeral: ೨ (kn))
- Karachay-Balkar: эки (eki)
- Karelian: kaksi
- Kashubian: dwa (csb)
- Kazakh: екі (kk) (eki)
- Khakas: ікі (íkí)
- Khmer: ពីរ (km) (pī) (numeral: ២)
- Komi: кык (kyk)
- Korean: 둘 (ko) (dul), (adjective) 두 (ko) (du); 이 (ko) (二, i)
- Kumyk: эки (eki)
- Kurdish: du (ku), دو (ku)
- Kyrgyz: эки (ky) (eki)
- Lao: ສອງ (lo) (sööng) (numeral: ໒ (lo))
- Latgalian: div
- Latin: duo (la) m and n, duae (la) f
- Latvian: divi (lv), divas (lv)
- Lithuanian: du (lt) m, dvi (lt) f
- Livonian: kakš
- Lojban: re (jbo)
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- Low German: twee (nds)
- Luxembourgish: zwee (lb), zwéin (lb), zwou (lb)
- Macedonian: два (mk) (dva)
- Malagasy: roa (mg)
- Malay:
- Rumi: dua (ms), dwi (ms)
- Jawi: دوا (ms), دوي (ms)
- Malayalam: രണ്ട് (ml) (raṇṭ)
- Maltese: tnejn (mt)
- Manchu: juwe
- Mansi: китыг (kityg)
- Manx: daa (gv), ghaa (gv)
- Maori: rua (mi)
- Mapudungun: epu
- Marathi: दोन (mr) (dona)
- Mari: кокыт (kokyt)
- Maricopa: xavik
- Marshallese: ruo (mh)
- Mi'kmaq: dabu
- Minangkabau: duo
- Mirandese: dous
- Mongolian: хоёр (mn) (khoyor), ᠬᠣᠶᠠᠷ (qoyar) (numeral: ᠒)
- Montagnais: nishᵘ
- Nahuatl: ome (nah)
- Nama: ǀgam
- Nauruan: aro (na)
- Navajo: naaki
- North Marquesan: úa
- Northern Sami: guokte
- Norwegian: to (no)
- Novial: du
- O'odham: go:k
- Occitan: dos (oc) m, doas (oc) f
- Ojibwe: niizh
- Old Church Slavonic: дъва (dŭva) m
- Old English: twēġen (ang) m, twā (ang) f and n
- Oriya: ଦୁଇ (or) (dui) (numeral: ୨ (or))
- Persian: دو (fa) (do) (numeral: ۲ (fa))
- Pipil: ume
- Polish: dwa (pl)
- Portuguese: dois (pt) m, duas (pt) f
- Punjabi: ਦੋ (pa) (dō) (numeral: ੨ (pa))
- Rajasthani: please add this translation if you can
- Rohingya: dui
- Romani: dui
- Romanian: doi (ro) m, două (ro) f
- Russian: два (ru) (dva) m and n, две (ru) (dve) f, двое (ru) (dvóje) (collective)
- Sanskrit: द्वि (sa) (dvi)
- Saterland Frisian: two
- Scots: twa
- Scottish Gaelic: dà (gd) (before nouns), dhà (gd) (free-standing), (persons) dithis (gd) f
- Serbo-Croatian:
- Cyrillic: два̑ (sh)
- Roman: dvȃ (sh)
- Sichuan Yi: ꑍ (nyip)
- Sicilian: dui (scn)
- Sikkimese: please add this translation if you can
- Sindhi: ٻَه (sd) (ba)
- Sinhalese: දෙක (si) (dheka)
- Slovak: dvaja (sk), dva (sk), dve (sk)
- Slovene: dvá (sl), (when counting) dvé (sl)
- Sorbian:
- Lower Sorbian: dwa
- South Marquesan: úa
- Southern Altai: эки (eki)
- Spanish: dos (es)
- Swedish: två (sv)
- Tachelhit: sin m, snat f
- Tagalog: dalawá (tl)
- Tahitian: piti, (when counting objects) rua, (when counting people) toopiti
- Tajik: ду (tg) (du)
- Talysh:
- Asalemi: ده (də)
- Tamil: இரண்டு (ta) (iraṇṭu) (numeral: ௨ (ta))
- Taos: wí’iną
- Tatar: ике (tt) (ike), ike (tt) (ike)
- Telugu: రెండు (te) (remḍu) (numeral: ౨ (te))
- Tetum: rua
- Thai: สอง (th) (sááwng) (numeral: ๒ (th))
- Tibetan: གཉིས (bo) (gnyis) (numeral: ༢ (bo))
- Tocharian A: wu, we
- Tocharian B: wi
- Tok Pisin: tupela (tpi)
- Tongan: ua (to)
- Tupinambá: mokõî
- Turkish: iki (tr)
- Turkmen: iki (tk)
- Tzutujil: ka’i
- Ukrainian: два (uk) (dva) m, дві (dvi) f, двоє (dvóje, collective), двійко (dvíjko, colloquial), двієчко (uk) (dvíječko) (colloquial diminutive)
- Urdu: دو (ur) (do)
- Uyghur: ئىككى (ug) (ikki)
- Uzbek: ikki (uz)
- Veps: kaks'
- Vietnamese: hai (vi)
- Volapük: tel (vo)
- Votic: kahsi / кахси
- Võro: katś
- Walloon: deus (wa)
- Welsh: dau (cy) m, dwy (cy) f
- West Frisian: twa (fy)
- Western Apache: naki
- Yakut: икки (ikki)
- Yiddish: צוויי (yi) (tsvey)
- Zhuang: 二 (ngeih), 双 (song)
- Zuni: kwili
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