| Volapük | vol-000 |
| Naureän | |
| Afrikaans | afr-000 | Naoeroe |
| Afrikaans | afr-000 | Nauru |
| Aghem | agq-000 | Nàwulù |
| Akan | aka-000 | Naworu |
| toskërishte | als-000 | Nauru |
| toskërishte | als-000 | Naurua |
| አማርኛ | amh-000 | ናኡሩ |
| العربية | arb-000 | ناورو |
| العربية | arb-000 | نورو |
| luenga aragonesa | arg-000 | Nauru |
| ISO 3166 alpha | art-006 | NR |
| UN M.49 | art-279 | 520 |
| مصري | arz-000 | ناورو |
| Kipare | asa-000 | Nauru |
| asturianu | ast-000 | Nauru |
| azərbaycanca | azj-000 | Nauru |
| Азәрбајҹан дили | azj-001 | Науру |
| bamanankan | bam-000 | Nawuru |
| ɓàsàa | bas-000 | Nerù |
| беларуская | bel-000 | Науру |
| বাংলা | ben-000 | নাউরু |
| Ekibena | bez-000 | Hunauru |
| བོད་སྐད་ | bod-000 | ནཽ་རུ། |
| bosanski | bos-000 | Nauru |
| босански | bos-001 | Науру |
| বিষ্ণুপ্রিয়া মণিপুরী ভাষা | bpy-000 | নাউরু |
| brezhoneg | bre-000 | Nauru |
| brezhoneg | bre-000 | Republik Nauru |
| बरʼ | brx-000 | नाउरू |
| български | bul-000 | Науру |
| català | cat-000 | Nauru |
| binisayang Sinugboanon | ceb-000 | Nauru |
| čeština | ces-000 | Nauru |
| čeština | ces-000 | Nauru-state |
| Rukiga | cgg-000 | Nauru |
| нохчийн мотт | che-000 | Науру |
| ᏣᎳᎩ ᎧᏬᏂᎯᏍᏗ | chr-000 | ᏃᎤᎷ |
| سۆرانی | ckb-000 | نائوروو |
| 普通话 | cmn-000 | 瑙鲁 |
| 國語 | cmn-001 | 諾魯 |
| 香港官話 | cmn-021 | 瑙魯 |
| Kernowek | cor-000 | Nauru |
| Qırımtatar tili | crh-000 | Nauru |
| Cymraeg | cym-000 | Nauru |
| Cymraeg | cym-000 | Nawrw |
| dansk | dan-000 | Nauru |
| Kitaita | dav-000 | Nauru |
| Deutsch | deu-000 | Nauru |
| Deutsch | deu-000 | Republik Nauru |
| Zazaki | diq-000 | Nauru |
| ދިވެހިބަސް | div-000 | ނައުރޫ |
| zarmaciine | dje-000 | Nauru |
| dolnoserbska reč | dsb-000 | Nauru |
| རྫོང་ཁ་ | dzo-000 | ནའུ་རུ་ |
| Kĩembu | ebu-000 | Nauru |
| eesti | ekk-000 | Nauru |
| ελληνικά | ell-000 | Ναουρού |
| ελληνικά | ell-000 | Ναούρου |
| English | eng-000 | Nauru |
| English | eng-000 | Republic of Nauru |
| 𐐀𐑍𐑊𐐮𐑇 | eng-006 | 𐐤𐐪𐐭𐑉𐐭 |
| Esperanto | epo-000 | Nauro |
| Esperanto | epo-000 | nauro |
| euskara | eus-000 | Nauru |
| Ɛʋɛgbɛ | ewe-000 | Nauru nutome |
| ewondo | ewo-000 | Naurú |
| føroyskt | fao-000 | Nauru |
| Wikang Filipino | fil-000 | Nauru |
| suomi | fin-000 | Nauru |
| français | fra-000 | Nauru |
| lenga arpitana | frp-000 | Naouru |
| Frysk | fry-000 | Nauru |
| Frysk | fry-000 | Naurû |
| Pulaar | fuc-000 | Nawuru |
| Fulfulde | ful-000 | Nawuru |
| lenghe furlane | fur-000 | Nauru |
| Gàidhlig | gla-000 | Nabhru |
| Gàidhlig | gla-000 | Nauru |
| Gaeilge | gle-000 | Nárú |
| galego | glg-000 | Nauru |
| galego | glg-000 | Nauru - Naoero |
| yn Ghaelg | glv-000 | Naaroo |
| Schwizerdütsch | gsw-000 | Nauru |
| ગુજરાતી | guj-000 | નૌરુ |
| Ekegusii | guz-000 | Nauru |
| kreyòl ayisyen | hat-000 | Naorou |
| Hausa | hau-000 | Nauru |
| Srpskohrvatski | hbs-001 | Nauru |
| עברית | heb-000 | נאורו |
| हिन्दी | hin-000 | नाउरु |
| hrvatski | hrv-000 | Nauru |
| hornjoserbšćina | hsb-000 | Nauru |
| magyar | hun-000 | Nauru |
| արևելահայերեն | hye-000 | Յարեն |
| արևելահայերեն | hye-000 | Նաուրու |
| Ido | ido-000 | Nauru |
| interlingua | ina-000 | Nauru |
| bahasa Indonesia | ind-000 | Nauru |
| íslenska | isl-000 | Nárú |
| italiano | ita-000 | Nauru |
| basa Jawa | jav-000 | Nauru |
| Kimachame | jmc-000 | Nauru |
| 日本語 | jpn-000 | ナウル |
| Taqbaylit | kab-000 | Nuru |
| kalaallisut | kal-000 | Nauru |
| Kĩkamba | kam-000 | Nauru |
| ಕನ್ನಡ | kan-000 | ನೌರು |
| كأشر | kas-000 | نارووٗ |
| kạ̄šur | kas-002 | Nauru |
| ქართული | kat-000 | ნაურუ |
| қазақ | kaz-000 | Науру |
| Chimakonde | kde-000 | Naulu |
| kriolu kabuverdianu | kea-000 | Nauru |
| монгол | khk-000 | Науру |
| ភាសាខ្មែរ | khm-000 | ណូរុ |
| ភាសាខ្មែរ | khm-000 | ណូរូ |
| Koyra Chiini | khq-000 | Nauru |
| Gĩkũyũ | kik-000 | Nauru |
| кыргыз | kir-000 | Науру |
| Kalenjin | kln-000 | Emetab Nauru |
| Kalenjin | kln-000 | Nauru |
| Kurmancî | kmr-000 | Naûrû |
| 한국어 | kor-000 | 나우루 |
| Kishambaa | ksb-000 | Naulu |
| rikpa | ksf-000 | nwarú |
| Kölsch | ksh-000 | Nauru |
| Kɨlaangi | lag-000 | Naúuru |
| ລາວ | lao-000 | ນາອູຣູ |
| latine | lat-000 | Naurum |
| latine | lat-000 | Nauruna Insula |
| lengua lígure | lij-000 | Nauru |
| Limburgs | lim-000 | Naoeroe |
| lingála | lin-000 | Nauru |
| lietuvių | lit-000 | Nauru |
| Lëtzebuergesch | ltz-000 | Nauru |
| Tshiluba | lub-000 | Nauru |
| Oluganda | lug-000 | Nawuru |
| Dholuo | luo-000 | Nauru |
| Oluluyia | luy-000 | Nauru |
| latviešu | lvs-000 | Nauru |
| മലയാളം | mal-000 | നൗറു |
| मराठी | mar-000 | नाउरू |
| मराठी | mar-000 | नौरू |
| ɔl Maa | mas-000 | Nauru |
| Kĩmĩrũ | mer-000 | Nauru |
| morisyin | mfe-000 | Nauru |
| македонски | mkd-000 | Науру |
| Malti | mlt-000 | Nauru |
| Malti | mlt-000 | Nawru |
| reo Māori | mri-000 | Nauru |
| mundaŋ | mua-000 | Sǝr Nauru |
| မြန်မာဘာသာ | mya-000 | နာဥူရူ |
| မြန်မာဘာသာ | mya-000 | နော်ရူး |
| مازرونی | mzn-000 | نائورو |
| Bân-lâm-gú | nan-005 | Nauru |
| Nàmá | naq-000 | Nauru |
| dorerin Naoero | nau-000 | Naoero |
| Nāhuatlahtōlli | nci-000 | Nauru |
| isiNdebele | nde-000 | Nauru |
| Plattdüütsch | nds-000 | Nauru |
| Plattdüütsch-Neddersassisch | nds-002 | Nauru |
| नेपाल भाषा | new-000 | नाउरु |
| Nederlands | nld-000 | Nauru |
| Kwasio | nmg-000 | Noru |
| nynorsk | nno-000 | Nauru |
| bokmål | nob-000 | Nauru |
| नेपाली | npi-000 | नाउरू |
| Runyankore | nyn-000 | Nauru |
| occitan | oci-000 | Nauru |
| ଓଡ଼ିଆ | ory-000 | ନାଉରୁ |
| ирон ӕвзаг | oss-000 | Науру |
| Amanung Sisuan | pam-000 | Nauru |
| ਪੰਜਾਬੀ | pan-000 | ਨਾਉਰੂ |
| پښتو ژبه | pbu-000 | ناورو |
| فارسی | pes-000 | نائورو |
| fiteny Malagasy | plt-000 | Naorò |
| lenga piemontèisa | pms-000 | Nauru |
| polski | pol-000 | Nauru |
| português | por-000 | Nauru |
| Runa Simi | que-000 | Nauru |
| Runa Simi | que-000 | Nawru |
| Qusqu qhichwa simi | quz-000 | Nawru |
| Kihorombo | rof-000 | Nauru |
| lingua rumantscha | roh-000 | Nauru |
| română | ron-000 | Nauru |
| Kirundi | run-000 | Nawuru |
| limba armãneascã | rup-000 | Nauru |
| русский | rus-000 | Науру |
| Kiruwa | rwk-000 | Nauru |
| Sängö | sag-000 | Nauru |
| संस्कृतम् | san-000 | नौरु |
| Samburu | saq-000 | Nauru |
| Ishisangu | sbp-000 | Nawulu |
| lingua siciliana | scn-000 | Nauru |
| cisena | seh-000 | Nauru |
| Koyraboro senni | ses-000 | Nauru |
| Žemaitiu | sgs-000 | Nauru |
| Tacelḥit | shi-001 | nawru |
| ⵜⴰⵛⵍⵃⵉⵜ | shi-003 | ⵏⴰⵡⵔⵓ |
| සිංහල | sin-000 | නාවුරු |
| slovenčina | slk-000 | Nauru |
| slovenčina | slk-000 | Nauruská republika |
| slovenščina | slv-000 | Nauru |
| davvisámegiella | sme-000 | Nauru |
| anarâškielâ | smn-000 | Nauru |
| gagana faʻa Samoa | smo-000 | Nauru |
| chiShona | sna-000 | Nauru |
| Soomaaliga | som-000 | Nauru |
| español | spa-000 | Nauru |
| shqip | sqi-000 | Naurua |
| српски | srp-000 | Науру |
| srpski | srp-001 | Nauru |
| svenska | swe-000 | Nauru |
| Kiswahili | swh-000 | Nauru |
| தமிழ் | tam-000 | நவூரு |
| தமிழ் | tam-000 | நௌரு |
| tatar tele | tat-000 | Науру |
| తెలుగు | tel-000 | నౌరు |
| Ateso | teo-000 | Nauru |
| тоҷикӣ | tgk-000 | Науру |
| Tagalog | tgl-000 | Nauru |
| ภาษาไทย | tha-000 | นาอูรู |
| ภาษาไทย | tha-000 | ประเทศนาอูรู |
| ภาษาไทย | tha-000 | สาธารณรัฐนาอูรู |
| ትግርኛ | tir-000 | ናኡሩ |
| lea fakatonga | ton-000 | Naulu |
| Tok Pisin | tpi-000 | Nauru |
| Türkçe | tur-000 | Nauru |
| Tásàwàq | twq-000 | Nauru |
| Tamaziɣt | tzm-001 | Nawru |
| ئۇيغۇرچە | uig-000 | ناۋرۇ |
| Uyghurche | uig-001 | Nawru |
| українська | ukr-000 | Науру |
| اردو | urd-000 | نؤرو |
| اردو | urd-000 | ناورو |
| oʻzbek | uzn-000 | Nauru |
| Ўзбекча | uzn-001 | Науру |
| ꕙꔤ | vai-000 | ꖆꖩ |
| Vai | vai-001 | Noru |
| tiếng Việt | vie-000 | Nauru |
| Kyivunjo | vun-000 | Nauru |
| Walser | wae-000 | Nauru |
| Winaray | war-000 | Nauru |
| kàllaama wolof | wol-000 | Nauru |
| kàllaama wolof | wol-000 | Nawru |
| Lusoga | xog-000 | Nawuru |
| nuasúɛ | yav-000 | nawulú |
| èdè Yorùbá | yor-000 | Orílẹ́ède Nauru |
| èdè Yorùbá Orílẹ̀-èdè Olómìnira ilẹ̀ Benin | yor-011 | Orílɛ́ède Nauru |
| 廣東話 | yue-000 | 瑙魯 |
| 廣東話 | yue-000 | 諾魯 |
| ⵜⴰⵎⴰⵣⵉⵖⵜ | zgh-000 | ⵏⴰⵡⵔⵓ |
| 原中国 | zho-000 | 瑙鲁 |
| Bahasa Malaysia | zsm-000 | Nauru |
| isiZulu | zul-000 | i-Nauru |