| Aragonese |
| has gloss | arg: | align=right cellpadding=3 id=toc style="margin-left: 15px;" |- style="text-align:center;" | Años: 24 aC 23 aC 22 aC - 21 aC - 20 aC 19 aC 18 aC |- style="text-align:center;" | Dezenios: Años 30 aC - Años 20 aC - Años 10 aC |- style="text-align:center;" | Sieglos: Sieglo II aC - Sieglo I aC - Sieglo I |} |
| lexicalization | arg: 21 aC |
| Asturian |
| lexicalization | ast: 21 edC |
| Belarusian |
| lexicalization | bel: 21 да н.э. |
| Bosnian |
| lexicalization | bos: 21 p.n.e. |
| Catalan |
| lexicalization | cat: 21 aC |
| Czech |
| has gloss | ces: Staletí: 2. století př. n. l. - 1. století př. n. l. - 1. století |
| lexicalization | ces: 21 př. n. l. |
| Welsh |
| has gloss | cym: 2il ganrif CC - Y ganrif 1af CC - Y ganrif 1af - 70au CC 60au CC 50au CC 40au CC 30au CC 20au CC 10au CC 00au CC 00au 10au 20au 26 CC 25 CC 24 CC 23 CC 22 CC 21 CC 20 CC 19 CC 18 CC 17 CC 16 CC |
| lexicalization | cym: 21 CC |
| Danish |
| has gloss | dan: Århundreder: 2. århundrede f.Kr. - 1. århundrede f.Kr. - 1. århundrede |
| lexicalization | dan: 21 f.Kr. |
| German |
| lexicalization | deu: 21 v. Chr. |
| Modern Greek (1453-) |
| lexicalization | ell: 21 π.Χ. |
| Esperanto |
| has gloss | epo: Eventoj Naskiĝoj *Sankta Maria laŭtradicie. Mortoj ---- -26 | -25 | -24 | -23 | -22 | -21 | -20 | -19 | -18 | -17 | -16 |
| lexicalization | epo: -21 |
| Estonian |
| lexicalization | est: 21 eKr |
| Basque |
| has gloss | eus: K. a. I. mendearen taula (K. a. II. mende | K. a. I. mende | I. mende) |
| lexicalization | eus: K. a. 21 |
| Persian |
| has gloss | fas: ۲۱ (پیش از میلاد) ۲۱مین سال قبل از تقویم میلادی است. مناسبتها رویدادها زادگان درگذشتگان |
| lexicalization | fas: ۲۱ |
| Finnish |
| lexicalization | fin: 21 eaa. |
| lexicalization | fin: 21 eaa |
| French |
| has gloss | fra: Cette page concerne l'année -21 du calendrier julien. |
| lexicalization | fra: -21 |
| Galician |
| lexicalization | glg: -21 |
| Croatian |
| lexicalization | hrv: 21. pr. Kr. |
| Hungarian |
| lexicalization | hun: I. e. 21 |
| Armenian |
| lexicalization | hye: Մ. թ. ա. 21 |
| Ido |
| lexicalization | ido: 21 aK |
| Indonesian |
| lexicalization | ind: 21 SM |
| Italian |
| lexicalization | ita: 21 a.C. |
| lexicalization | ita: 21 AC |
| Japanese |
| has gloss | jpn: 紀元前21年は、ユリウス暦では日曜日から始まる閏年である。 |
| lexicalization | jpn: 紀元前21年 |
| Georgian |
| lexicalization | kat: ძვ. წ. 21 |
| Korean |
| lexicalization | kor: 기원전 21년 |
| Kölsch |
| lexicalization | ksh: Joohr 21 füür Kreßtuß |
| lexicalization | ksh: Joohr 21 füür Kreßtůß |
| lexicalization | ksh: Joohr 21 füür Krėßtuß |
| lexicalization | ksh: Joohr 21 füür Krėßtůß |
| Latin |
| lexicalization | lat: 21 a.C.n. |
| Lithuanian |
| has gloss | lit: 21 m. pr. m. e. buvo nekeliamieji metai, prasidedantys sekmadienį pagal Grigaliaus kalendorių. |
| lexicalization | lit: 21 m. pr. m. e. |
| Letzeburgesch |
| has gloss | ltz: 2. Joerhonnert v. Chr. | 1. Joerhonnert v. Chr. | 1. Joerhonnert |
| lexicalization | ltz: -21 |
| Marathi |
| lexicalization | mar: इ.स.पू. २१ |
| Macedonian |
| lexicalization | mkd: 21 п.н.е. |
| Malay (macrolanguage) |
| lexicalization | msa: 21 SM |
| Nahuatl languages |
| has gloss | nah: -21 ītōca cē xihuitl īpan mācuīlpōhualxihuitl -1 īpan -20s mahtlācxihuitl. |
| lexicalization | nah: -21 |
| Neapolitan |
| lexicalization | nap: 21 AC |
| Nepal Bhasa |
| has gloss | new: इ॰ पू॰ २१ ग्रेगोरियन पात्रो यागु छगु दँ खः। |
| lexicalization | new: इ॰ पू॰ २१ |
| Dutch |
| lexicalization | nld: 21 v. Chr. |
| lexicalization | nld: 21 v.Chr. |
| Norwegian Nynorsk |
| lexicalization | nno: -21 |
| Norwegian |
| lexicalization | nor: 21 f.Kr. |
| Occitan (post 1500) |
| lexicalization | oci: -21 |
| Polish |
| has gloss | pol: |align=left width=100% |valign=top width=100%| rok 21 p.n.e. II wiek p.n.e. · I wiek p.n.e. · I wiek 23 p.n.e. « 22 p.n.e. « 21 p.n.e. » 20 p.n.e. » 19 p.n.e. |
| lexicalization | pol: 21 p.n.e. |
| Portuguese |
| lexicalization | por: 21 a.C. |
| Quechua |
| has gloss | que: 21 Kristup ñawpan wataqa (21 kñ) Hulyanu kalindaryukama intichawwan qallarisqa wakllanwatam karqan. |
| lexicalization | que: 21 kñ |
| Moldavian |
| has gloss | ron: Milenii: Mileniul II î.Hr. - Mileniul I î.Hr. - Mileniul I |
| lexicalization | ron: 21 î.Hr. |
| Russian |
| lexicalization | rus: 21 год до н. э. |
| Slovak |
| lexicalization | slk: 21 pred Kr. |
| Slovenian |
| lexicalization | slv: 21 pr. n. št. |
| lexicalization | slv: Leto 21 pr. n. št. |
| Castilian |
| lexicalization | spa: 21 a C |
| lexicalization | spa: 21 a. C. |
| lexicalization | spa: 21 a.C. |
| Albanian |
| has gloss | sqi: Mbi vitin 21 p.e.s.. |
| lexicalization | sqi: 21 p.e.s. |
| Serbian |
| lexicalization | srp: 21. п. н. е. |
| lexicalization | srp: 21. п.н.е. |
| lexicalization | srp: 21. пне. |
| Sundanese |
| has gloss | sun: 21 SM nyaéta taun ka-21 Saméméh Maséhi dina Kalénder Gregorian. |
| lexicalization | sun: 21 SM |
| Swedish |
| lexicalization | swe: 21 f.Kr. |
| Tatar |
| lexicalization | tat: MA 21 |
| Thai |
| has gloss | tha: พุทธศักราช 523 ใกล้เคียงกับ 21 ปีก่อนคริสตกาล |
| lexicalization | tha: พ.ศ. 523 |
| Turkish |
| lexicalization | tur: M.Ö. 21 |
| Ukrainian |
| lexicalization | ukr: 21 до н. е. |
| lexicalization | ukr: 21 до н.е. |
| Uzbek |
| has gloss | uzb: Mil. av. 21 |
| lexicalization | uzb: Mil. av. 21 |
| Venetian |
| lexicalization | vec: 21 a.C. |
| Volapük |
| lexicalization | vol: 21 b.K. |
| Chinese |
| lexicalization | zho: 前21年 |
