| Nederlands | nld-000 |
| ijsmaand | |
| Afrikaans | afr-000 | Januarie |
| Englisce sprǣc | ang-000 | æfterra Gēola |
| Classical Arabic—ASJP | arb-001 | kānūn ath-thānī |
| Classical Arabic—ASJP | arb-001 | yanāyir |
| luenga aragonesa | arg-000 | chinero |
| asturianu | ast-000 | xineru |
| azərbaycanca | azj-000 | yanvar |
| biełaruskaja łacinka | bel-002 | studzen' |
| bosanski | bos-000 | januar |
| bosanski | bos-000 | siječanj |
| brezhoneg | bre-000 | Genver |
| български | bul-000 | януари |
| català | cat-000 | gener |
| binisayang Sinugboanon | ceb-000 | enero |
| čeština | ces-000 | leden |
| чӑваш | chv-000 | кăрлач |
| Kernowek | cor-000 | Mys Genver |
| lingua corsa | cos-000 | ghjennaghju |
| lingua corsa | cos-000 | ghjinnaghju) |
| kaszëbsczi jãzëk | csb-000 | stëcznik |
| Cymraeg | cym-000 | ionawr |
| dansk | dan-000 | glugmåned |
| dansk | dan-000 | januar |
| Deutsch | deu-000 | Januar |
| dolnoserbska reč | dsb-000 | januar |
| eesti | ekk-000 | jaanuar |
| Ellinika | ell-003 | Ianuarios |
| Ellinika | ell-003 | Jenaris |
| English | eng-000 | January |
| Esperanto | epo-000 | januaro |
| euskara | eus-000 | urtarril |
| føroyskt | fao-000 | januar |
| suomi | fin-000 | tammikuu |
| français | fra-000 | janvier |
| Frysk | fry-000 | jannewaris |
| lenghe furlane | fur-000 | genâr |
| Gàidhlig | gla-000 | Faoilleach |
| Gaeilge | gle-000 | Eanáir |
| galego | glg-000 | Xaneiro |
| yn Ghaelg | glv-000 | Jerrey Gueree |
| avañeʼẽ | gug-000 | Jasyteĩ |
| kreyòl ayisyen | hat-000 | Janvye |
| ʻōlelo Hawaiʻi | haw-000 | Ianuali |
| עברית | heb-000 | ינואר |
| hrvatski | hrv-000 | januar |
| hrvatski | hrv-000 | siječanj |
| hornjoserbšćina | hsb-000 | januar |
| hornjoserbšćina | hsb-000 | wulki róžk |
| magyar | hun-000 | január |
| hyw-001 | hunwar | |
| Ido | ido-000 | januaro |
| Inuktitut | iku-001 | Jannuaari |
| interlingua | ina-000 | januario |
| bahasa Indonesia | ind-000 | januari |
| íslenska | isl-000 | janúar |
| italiano | ita-000 | gennaio |
| la lojban. | jbo-000 | pavma'i |
| 日本語 | jpn-000 | いちがつ, ichigatsu |
| ಕನ್ನಡ | kan-000 | ಜನವರಿ |
| Kartuli | kat-001 | ianvari |
| ikinyarwanda | kin-000 | Mutarama |
| Kurmancî | kmr-000 | rêbendan |
| Hangungmal | kor-001 | ilwol |
| Hangungmal | kor-001 | jongwol |
| latine | lat-000 | Ianuarius |
| lietuvių | lit-000 | sausis |
| latviešu | lvs-000 | janvāris |
| मराठी | mar-000 | जानेवारी |
| Malti | mlt-000 | Jannar |
| reo Māori | mri-000 | Hiringa a nuku |
| reo Māori | mri-000 | Hānuere |
| reo Māori | mri-000 | Kohi tātea |
| Nederlands | nld-000 | hardmaand |
| Nederlands | nld-000 | januari |
| Nederlands | nld-000 | louwmaand |
| Nederlands | nld-000 | wolfsmaand |
| bokmål | nob-000 | januar |
| Novial | nov-000 | januare |
| occitan | oci-000 | genièr |
| Amanung Sisuan | pam-000 | eneru |
| ਪੰਜਾਬੀ | pan-000 | ਜਨਵਰੀ |
| Pennsilfaanisch Deitsch | pdc-000 | Yenner |
| Isfahani | pes-001 | žānwiye |
| polski | pol-000 | styczeń |
| português | por-000 | janeiro |
| Qusqu qhichwa simi | quz-000 | Qhulla puquy killa |
| lingua rumantscha | roh-000 | schaner |
| română | ron-000 | cărindar |
| română | ron-000 | gerar |
| română | ron-000 | ianuarie |
| russkij | rus-001 | janwar' |
| slovenčina | slk-000 | január |
| slovenščina | slv-000 | januar |
| Soomaaliga | som-000 | janaayo |
| Sesotho | sot-000 | Pherekgong |
| español | spa-000 | enero |
| shqip | sqi-000 | janar |
| sardu | srd-000 | ghennàrgiu |
| sardu | srd-000 | jannarzu |
| srpski | srp-001 | januar |
| svenska | swe-000 | januari |
| svenska | swe-000 | torsmånad |
| Kiswahili | swh-000 | Januari |
| தமிழ் | tam-000 | ஜனவரி |
| తెలుగు | tel-000 | జనవర |
| lia-tetun | tet-000 | janeiru |
| Tagalog | tgl-000 | Enero |
| ภาษาไทย | tha-000 | มกราคม |
| Tok Pisin | tpi-000 | Janueri |
| xiTsonga | tso-000 | sunguti |
| Türkçe | tur-000 | ocak |
| тыва дыл | tyv-000 | январь |
| Latynytsia | ukr-001 | sitschen' |
| اردو | urd-000 | جنوری |
| oʻzbek | uzn-000 | yanvar |
| vepsän kel’ | vep-000 | viluku |
| lingaedje walon | wln-000 | djanvî |
| kàllaama wolof | wol-000 | samwie |
| isiXhosa | xho-000 | uJanuwari |
| èdè Yorùbá | yor-000 | oṣù kínní |
| isiZulu | zul-000 | uJanuwari |