- Afrikaans:een-en-twintig (af)
- Amharic:ሃያ አንድ(haya ʾänd)
- Arabic:وَاحِد وَعِشْرُون(wāḥid wa-ʕišrūn)
- Hijazi Arabic:واحد و عشرين(wāḥid u ʕišrīn)
- Armenian:քսանմեկ (hy)(kʻsanmek)
- Assyrian Neo-Aramaic:ܥܸܣܪܝܼ ܘܚܲܕ݇ m(ʿisrī w-ḥa),ܥܸܣܪܝܼ ܘܚܕܵܐ f(ʿisrī w-ḥdā)
- Azerbaijani:iyirmi bir (az)
- Basque:hogeita bat (eu)
- Belarusian:два́ццаць адзі́н(dváccacʹ adzín)
- Bengali:একুশ (bn)(ekuś)
- Breton:unan-warn-ugent
- Bulgarian:двадесет и едно(dvadeset i edno)
- Burmese:နှစ်ဆယ့်တစ်(hnachcai.tac)
- Catalan:vint-i-un (ca)
- Cebuano:kawhaa`g usa,bayente uno
- Central Sierra Miwok:naˀ·á- kéŋ·e-ˀ hej·i-ˀ
- Chechen:ткъе цхьаъ(tqʼe cḥʳaʔ)
- Cherokee:ᏔᎵᏍᎪ ᏌᏬ(talisgo sawo)
- Chichewa:makumi awiri n'chimodzi
- Chinese:
- Cantonese:二十一(ji6 sap6 jat1),廿一 (yue)(jaa6 jat1)
- Mandarin:二十一 (zh)(èrshíyī)
- Wu:廿一
- Classical Nahuatl:cempōhualli oncē
- Czech:dvacet jedna (cs),jednadvacet (cs)
- Danish:enogtyve (da)
- Dhivehi:އެކާވީސް(ekāvīs)
- Dutch:eenentwintig (nl) f
- Esperanto:dudek unu
- Estonian:kakskümmend üks (et)
- Ewe:blaeve vɔ ɖekɛ
- Faroese:ein og tjúgu
- Fijian:ruasagavulu ka dua
- Finnish:kaksikymmentäyksi (fi)
- French:vingt-et-un (fr) m
- Galician:vinte e un (gl)
- Georgian:ოცდაერთი(ocdaerti)
- German:einundzwanzig (de) f
- Greek:είκοσι ένα (el)(eíkosi éna)
- Gujarati:એકવીસ (gu)(ekavīs)
- Haitian Creole:venteyen
- Hebrew:עשרים־ואחד(esrím və-ekhád)
- Hindi:इक्कीस (hi)(ikkīs)
- Hungarian:huszonegy (hu)
- Icelandic:tuttugu og einn (is)
- Indonesian:dua puluh satu
- Interlingua:vinti-un
- Irish:fiche a haon,aon is fiche
- Italian:ventuno (it)
- Japanese:二十一(nijūichi)
- Javanese:salikur (jv),selikur (jv)
- Kannada:ಇಪ್ಪತ್ತೊಂದು (kn)(ippattondu)
- Kazakh:жиырма бір(jiyrma bır)
- Khmer:ម្ភៃមួយ(mpʰey muəy)
- Korean:스물 하나(seumul hana)
- Kurdish:
- Central Kurdish:بیست و یەک(bîst û yek)
- Kyrgyz:жыйырма бир(jıyırma bir)
- Lakota:wikčémna núŋpa aké waŋží
- Lao:ຊາວເອັດ(sāo ē ʼat)
- Latin:viginti unus (la)
- Latvian:divdesmit viens (lv)
- Louisiana Creole French:vin-ché-un
- Lü:ᦌᦱᧁᦵᦀᧆ(saaw˙ʼed)
- Macedonian:два́есет и е́ден(dváeset i éden)
- Malay:dua puluh satu,selikur,satu likur
- Malayalam:ഇരുപത്തൊന്ന്(irupattonnŭ),ഇരുപത്തിയൊന്ന്(irupattiyonnŭ)
- Maltese:wieħed u għoxrin
- Manchu:ᠣᡵᡳᠨ
ᡝᠮᡠ(orin emu) - Maori:rua tekau mā tahi (mi),rua ngahuru mā tahi(older term)
- Navajo:naadįįłaʼ
- Nheengatu:irundí-pú-yepé
- Norwegian:
- Bokmål:tjueen,tjueén
- Nynorsk:tjueein
- Ojibwe:niishtanashi-bezhig
- Old English:ān and twēntiġ
- Pennsylvania German:een un zwansich
- Persian:بیست و یک(bist-o-yek)
- Polish:dwadzieścia jeden (pl)
- Portuguese:vinte e um (pt)
- Punjabi:ਇੱਕੀ(ikkī)
- Quechua:iskay chunka hukniyuq
- Romanian:douăzeci și unu
- Russian:два́дцать оди́н (ru)(dvádcatʹ odín)
- Samoan:luasefulu tasi
- Sanskrit:एकविंशति (sa)(ékaviṃśati)
- Serbo-Croatian:
- Cyrillic:двадесет и један
- Roman:dvadeset i jedan
- Shan:သၢဝ်းဢဵတ်း(sáao ʼáet)
- Slovene:enaindvajset (sl)
- Spanish:veintiuno (es) m
- Swedish:tjugoett (sv),tjugoen
- Sylheti:ꠄꠇꠂꠡ(exoiśo)
- Tagalog:beynte uno,dalawmpu't isa
- Tamil:இருபத்தொன்று(irupattoṉṟu)
- Telugu:ఇరవై ఒకటి(iravai okaṭi)
- Thai:ยี่สิบเอ็ด(yîi-sìp-èt)
- Tok Pisin:tupela ten wan
- Tongan:uofulu mā taha
- Turkish:yirmi bir (tr)
- Ukrainian:два́дцять оди́н(dvádcjatʹ odýn)
- Urdu:اکیس(ikkīs)
- Uyghur:يىگىرمە بىر(yigirme bir)
- Vietnamese:hai mươi mốt
- Volapük:teldegbal,telsebal(older term, obsolete)
- Welsh:un ar hugain(vigesimal, traditional),dau ddeg un (cy)(decimal),trisaith(obsolete)
- West Frisian:ienentweintich (fy)
- Yiddish:איין און צוואַנציק(eyn un tsvantsik)
- Yup'ik:yuinaq atauciq
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