- Afrikaans: twaalf (af)
- Ainu: tu ikasima wan
- Albanian: dymbëdhjetë (sq)
- Amharic: ዐሥራ ሁለት (ʿäśra hulät)
- Arabic: اِثْنَا عَشَرَ (iṯnā ʿašara)
- Egyptian Arabic: اتناشر (itnašar)
- Hijazi Arabic: اثنعش (iṯnaʕaš), اتنعش (itnaʕaš)
- Aragonese: dotze, doce, doze
- Aramaic: תרעסר m (tre‘sar), תרתעסרא f (tarta‘esrē)
- Assyrian Neo-Aramaic: ܬܪܸܥܣܲܪ (triˁsar)
- Syriac: ܬܪܥܣܪ m (treʿsar), ܬܪܬܥܣܪܐ f (tartaʿesrē)
- Armenian: տասներկու (hy) (tasnerku)
- Asturian: doce (ast)
- Aymara: tunka payani
- Azerbaijani: on iki (az)
- Bashkir: ун ике (un ike)
- Basque: hamabi (eu)
- Belarusian: двана́ццаць (be) (dvanáccacʹ)
- Bengali: বারো (bn) (baro) (numeral: ১২)
- Bikol Central: kagduwa
- Breton: daouzek (br)
- Brunei Malay: dua balas
- Bulgarian: двана́десет (dvanádeset), двана́йсет (dvanájset)
- Burmese: ဆယ့်နှစ် (my) (hcai.hnac) (numeral: ၁၂)
- Buryat: арбан хоёр (arban xojor)
- Carpathian Rusyn: двана́дцять (dvanádcjatʹ)
- Catalan: dotze (ca)
- Cebuano: napulog duha
- Central Sierra Miwok: ˀoṭíkšake·ny-
- Chakma: молим додајте овај превод ако можете
- Chamicuro: chunka ma'pojta
- Chechen: шийтта (šiitta)
- Cherokee: ᏔᎵᏚ (talidu)
- Chichewa: khumi n'ziwiri
- Chickasaw: awa toklo, pokkó'li awa toklo
- Chinese:
- Cantonese: 十二 (sap6 ji6)
- Hakka: 十二 (sṳ̍p-ngi)
- Mandarin: 十二 (zh) (shí'èr) (numeral: 拾貳)
- Chuukese: engon me ru
- Chuvash: вуниккӗ (vunikkĕ), вуникӗ (vunikĕ), вуник (vunik)
- Classical Nahuatl: mahtlāctli omōme
- Crimean Tatar: on eki
- Czech: dvanáct (cs)
- Dalmatian: dotco
- Danish: tolv (da)
- Dena'ina: nutiha beq'di
- Dhivehi: ބާރަ (bāra), ދޮޅަސް (doḷas)
- Dutch: twaalf (nl)
- Dzongkha: བཅུ་གཉིས (bcu gnyis)
- Esperanto: dek du
- Estonian: kaksteist (et)
- Faroese: tólv (fo)
- Fijian: tini ka rua
- Finnish: kaksitoista (fi)
- French: douze (fr)
- Friulian: dodis
- Galician: doce (gl)
- Garifuna: dûsu
- Georgian: თორმეტი (ka) (tormeṭi)
- German: zwölf (de)
- Gothic: 𐍄𐍅𐌰𐌻𐌹𐍆 (twalif)
- Greek: δώδεκα (el) (dódeka)
- Ancient: δώδεκα (dṓdeka), ιβ΄ (numeral)
- Greenlandic: aqqaneq-marluk (kl)
- Gujarati: બાર (gu) (bār) (numeral: ૧૨)
- Haitian Creole: douz
- Hawaiian: ʻumikūmālua
- Hebrew: (used in counting) שְׁתֵּים־עֶשְׂרֵה f (shteim esre), שְׁנֵים־עָשָׂר m (shneim asar)
- Hindi: बारह (hi) (bārah)
- Hopi: pakwt niikyang löqmuy siikya’ta
- Hungarian: tizenkettő (hu)
- Hunsrik: zwellef
- Icelandic: tólf (is)
- Ido: dek-e-du (io)
- Indonesian: dua belas (id)
- Ingrian: kakstoist
- Interlingua: (молим оверавање) dece-duo , (молим оверавање) duodece
- Irish: dó dhéag (ga)
- Italian: dodici (it)
- Japanese: 十二 (ja) (じゅうに, jūni)
- Kannada: ಹನ್ನೆರಡು (kn) (hanneraḍu), ೧೨ (12) (numeral)
- Karelian: kaksitostu
- Kazakh: он екі (on ekı)
- Khmer: ដប់ពីរ (dop pī) (numeral: ១២)
- Komi-Permyak: даскык (daskyk)
- Korean: 열둘 (ko) (yeoldul), 십이(十二) (ko) (sibi)
- Kurdish:
- Central Kurdish: دوانزە (dwanze), دوازدە (dwazde)
- Northern Kurdish: dazde (ku)
- Southern Kurdish: Lua грешка in Модул:languages/doSubstitutions at line 80: Substitution data 'sdh-translit' does not match an existing module..
- Kyrgyz: он эки (ky) (on eki)
- Ladin: dodesc
- Lakota: akénuŋpa
- Lao: ສິບສອງ (sip sǭng) (numeral: ໑໒)
- Latgalian: divpadsmit
- Latin: duodecim (la)
- Latvian: divpadsmit (lv)
- Ligurian: dózze
- Lithuanian: dvylika (lt)
- Livonian: kakštuoistõn
- Lombard: dodes
- Louisiana Creole French: douz
- Low German: twölf (nds), twolf (nds)
- Lü: ᦉᦲᧇᦉᦸᧂ (ṡiibṡoang) (numeral: ᧑᧒)
- Luxembourgish: zwielef (lb)
- Macedonian: двана́есет (dvanáeset)
- Malagasy: roa ambinifolo
- Malay: dua belas (ms), sepuluh dua, satu puluh dua
- Malayalam: പന്ത്രണ്ട് (ml) (pantraṇṭŭ)
- Maltese: tnax
- Manchu: ᠵᡠᠸᠠᠨ
ᠵᡠᠸᡝ
- Manx: daa yeig
- Maore Comorian: kumi na mbili
- Maori: tekau mā rua (mi), ngahuru mā rua (older term)
- Middle English: twelve
- Mon: စှ်ၜါ
- Mongolian:
- Cyrillic: арван хоёр (arvan hojor)
- Mongolian: ᠠᠷᠪᠠᠨ
ᠬᠣᠶᠠᠷ (arban qoyar), (numeral) ᠑᠒ (12))
- Nauruan: ata ma aro
- Navajo: naakitsʼáadah
- Ngazidja Comorian: kume na -ili
- Northern Mansi: Lua грешка in Модул:languages/doSubstitutions at line 80: Substitution data 'mns-translit' does not match an existing module..
- Norwegian: tolv (no)
- Occitan: dotze (oc)
- Odia: ବାର (or) (barô) (numeral: ୧୨ (12))
- Ojibwe: ashi-niizh
- Old Church Slavonic: дъва на дєсѧтє (dŭva na desęte) (numeral: в҃і)
- Old English: twelf
- Pali: dvādasa
- Pennsylvania German: zwelf, zwelfe
- Persian: دوازده (fa) (davâzdah)
- Piedmontese: dódes
- Polish: dwanaście (pl), (collective) dwanaścioro (pl)
- Portuguese: doze (pt)
- Punjabi: ਬਾਰਾਂ (bārā̃) (numeral: ੧੨)
- Quechua: chunka iskayniyuq
- Rakhine: молим додајте овај превод ако можете
- Rohingya: baró
- Romagnol: dodṣ, dodg
- Romani: deśuduj
- Kalo Finnish Romani: deȟ-o-dui
- Romanian: (молим оверавање) doisprezece (ro) m, (informal) (молим оверавање) doișpe (ro) m, (молим оверавање) douăsprezece f or n, (informal) (молим оверавање) douășpe f or n
- Romansch: dudesch (Grischun)
- Russian: двена́дцать (ru) (dvenádcatʹ)
- S'gaw Karen: တဆံခံ (təhsikhi)
- Sami:
- Inari: kyehtnubáloh
- Northern: guoktenuppelohkái
- Skolt: kuâtmlo
- Southern: luhkie göökte
- Samoan: sefulu lua
- Sanskrit: द्वादश (sa) (dvādaśa)
- Santali: ᱜᱮᱞ ᱵᱟᱨ (gel bar)
- Sardinian: dóghi
- Scottish Gaelic: dà dheug, a dhà dheug
- Serbo-Croatian:
- Cyrillic: два́нае̄ст
- Roman: dvánaēst
- Shan: သိပ်းသွင် (síp sǒang)
- Sinhalese: දොළහ (doḷaha)
- Slovak: dvanásť (sk)
- Slovene: dvanájst (sl)
- Sorbian:
- Lower Sorbian: dwanasćo
- Upper Sorbian: dwanaće
- Southern Altai: он эки (on eki)
- Spanish: doce (es)
- Sranan Tongo: twarfu
- Swahili: kumi na mbili
- Swedish: tolv (sv)
- Sylheti: молим додајте овај превод ако можете
- Tagalog: labindalawa (tl)
- Tahitian: hō'ē 'ahuru ma piti
- Tajik: дувоздаҳ (tg) (duvozdah)
- Tamil: பன்னிரண்டு (ta) (paṉṉiraṇṭu)
- Tatar: унике (unike)
- Telugu: పండ్రెండు (te) (paṇḍreṇḍu)
- Thai: สิบสอง (th) (numeral: ๑๒)
- Tibetan: བཅུ་གཉིས (bcu gnyis)
- Tigre: ዐስር ወክልኦት (ʿäsr wäklʾot), ዐስር ወክልኤ (ʿäsr wäklʾe)
- Tigrinya: ዓሰርተ ክልተ (ʿasärtä kltä)
- Tok Pisin: twelv, wanpela ten tu
- Tongan: hongofulu mā ua
- Turkish: on iki (tr)
- Turkmen: on iki (tk)
- Ukrainian: двана́дцять (uk) (dvanádcjatʹ)
- Urdu: بارہ (bārah)
- Uyghur: ئون ئىككى (ug) (on ikki)
- Uzbek: oʻn ikki (uz)
- Venetian: dódexe (vec)
- Vietnamese: mười hai (vi)
- Vilamovian: cwełf
- Volapük: degtel (vo), balsetel (older term, obsolete)
- Walloon: doze (wa)
- Welsh: deuddeg (cy) (vigesimal, traditional), undeg dau m (decimal), undeg dwy f (decimal)
- West Frisian: tolf (fy), tolve (fy)
- Wolof: fukk ak ñaar
- Yao: likumi kwisa wili
- Yiddish: צוועלף (tsvelf)
- Yup'ik: qula malruk
- Zazaki: dıwês (diq), desudıdı
- Zhuang: cib ngeih
- Zuni: asdemłan kwili yałdo'
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