| Panjābī | pan-001 |
| aiparil | |
| Afrikaans | afr-000 | april |
| Classical Arabic—ASJP | arb-001 | nīsān |
| asturianu | ast-000 | abril |
| Aymara | aym-000 | jupha llamay phajjsi |
| azərbaycanca | azj-000 | aprel |
| boarisch | bar-000 | Abbrui |
| Bangla | ben-001 | epril |
| bosanski | bos-000 | april |
| brezhoneg | bre-000 | Ebrel |
| bălgarski ezik | bul-001 | april |
| català | cat-000 | abril |
| čeština | ces-000 | duben |
| Çăvaşla | chv-001 | aka |
| Hànyǔ | cmn-003 | sìyuè |
| lingua corsa | cos-000 | aprile |
| kaszëbsczi jãzëk | csb-000 | łżëkwiôt |
| Cymraeg | cym-000 | Ebrill |
| dansk | dan-000 | april |
| Deutsch | deu-000 | April |
| dolnoserbska reč | dsb-000 | apryl |
| eesti | ekk-000 | aprill |
| Ellinika | ell-003 | Aprílios |
| English | eng-000 | April |
| Esperanto | epo-000 | aprilo |
| euskara | eus-000 | apiril |
| føroyskt | fao-000 | apríl |
| vosa Vakaviti | fij-000 | Epereli |
| suomi | fin-000 | huhtikuu |
| français | fra-000 | avril |
| Frysk | fry-000 | april |
| Gàidhlig | gla-000 | Giblean |
| Gaeilge | gle-000 | Aibreán |
| galego | glg-000 | abril |
| yn Ghaelg | glv-000 | Averil |
| avañeʼẽ | gug-000 | jasyrundy |
| Gujrātī | guj-001 | epril |
| ISO 259-3 | heb-001 | april |
| hrvatski | hrv-000 | travanj |
| hornjoserbšćina | hsb-000 | apryl |
| hornjoserbšćina | hsb-000 | haperleja |
| magyar | hun-000 | április |
| interlingua | ina-000 | april |
| bahasa Indonesia | ind-000 | april |
| íslenska | isl-000 | aprílmánuður |
| italiano | ita-000 | aprile |
| 日本語 | jpn-000 | しがつ, shigatsu |
| Kartuli | kat-001 | ap'rili |
| Qazaq tili | kaz-002 | kökek |
| Mongol khel | khk-001 | dörövdügeer sar |
| Kırgızça | kir-002 | aprel |
| Kurmancî | kmr-000 | nîsan |
| Hangungmal | kor-001 | sa.wol |
| latine | lat-000 | aprilis |
| Limburgs | lim-000 | aprèl |
| lingála | lin-000 | avril |
| lietuvių | lit-000 | balandis |
| Lëtzebuergesch | ltz-000 | Abrëll |
| latviešu | lvs-000 | aprîlis |
| MaraaThii | mar-001 | epril |
| teny malagasy | mlg-000 | aprily |
| Malti | mlt-000 | April |
| reo Māori | mri-000 | Ngahuru mātahi |
| reo Māori | mri-000 | Paenga whāwhā |
| reo Māori | mri-000 | Āperira |
| Nederlands | nld-000 | april |
| Nederlands | nld-000 | eiermaand |
| Nederlands | nld-000 | grasmaand |
| Nederlands | nld-000 | paasmaand |
| bokmål | nob-000 | april |
| Novial | nov-000 | aprile |
| occitan | oci-000 | abrial |
| occitan | oci-000 | abril |
| Isfahani | pes-001 | avrîl |
| polski | pol-000 | kwiecień |
| português | por-000 | abril |
| Qusqu qhichwa simi | quz-000 | ayriwa |
| lingua rumantscha | roh-000 | avrigl |
| română | ron-000 | aprilie |
| russkij | rus-001 | aprél |
| saṃskṛtam | san-001 | āṅglavarṣasya caturthamāsaḥ |
| slovenčina | slk-000 | apríl |
| slovenščina | slv-000 | april |
| gagana faʻa Samoa | smo-000 | 'Aperila |
| chiShona | sna-000 | kubvumbi |
| Soomaaliga | som-000 | abriil |
| Sesotho | sot-000 | Mmesa |
| español | spa-000 | abril |
| shqip | sqi-000 | prill |
| srpski | srp-001 | april |
| svenska | swe-000 | april |
| Kiswahili | swh-000 | aprili |
| tatar tele | tat-000 | äpril |
| Tagalog | tgl-000 | Abril |
| phasa thai | tha-001 | meh sáá yohn |
| tigriñā | tir-001 | miazia |
| türkmençe | tuk-000 | aprel |
| Türkçe | tur-000 | nisan |
| Uyghurche | uig-001 | āprīl |
| Latynytsia | ukr-001 | kwiten |
| Urdu | urd-002 | aprīl |
| oʻzbek | uzn-000 | aprel' |
| lingaedje walon | wln-000 | avri |
| Bahasa Malaysia | zsm-000 | bulan April |
| isiZulu | zul-000 | I-ephuleli |