| English | eng-000 |
| Illinois | |
| Afrikaans | afr-000 | Illinois |
| toskërishte | als-000 | Illinois |
| Englisce sprǣc | ang-000 | Illinois |
| العربية | arb-000 | إلينوي |
| العربية | arb-000 | إيلينوي |
| ISO 3166 alpha | art-006 | USA-IL |
| Universal Networking Language | art-253 | illinois(icl>algonquian>thing) |
| Universal Networking Language | art-253 | illinois(iof>american_state>thing) |
| ISO 3166-2 | art-416 | US-IL |
| azərbaycanca | azj-000 | İllinoys |
| boarisch | bar-000 | Illinois |
| тарашкевіца | bel-001 | Ілінойс |
| বাংলা | ben-000 | ইলিনয় |
| bosanski | bos-000 | Illinois |
| বিষ্ণুপ্রিয়া মণিপুরী ভাষা | bpy-000 | ইলিনয়স |
| brezhoneg | bre-000 | Illinois |
| български | bul-000 | Илинойс |
| català | cat-000 | Illinois |
| čeština | ces-000 | Illinois |
| čeština | ces-000 | stát v USA |
| чӑваш | chv-000 | Иллинойс |
| 普通话 | cmn-000 | 伊利诺 |
| 普通话 | cmn-000 | 伊利诺伊 |
| 普通话 | cmn-000 | 伊利诺伊州 |
| 普通话 | cmn-000 | 伊利诺州 |
| 普通话 | cmn-000 | 伊利诺斯州 |
| 國語 | cmn-001 | 伊利諾 |
| 國語 | cmn-001 | 伊利諾斯州 |
| Hànyǔ | cmn-003 | Yīlìnuòzhōu |
| Kernowek | cor-000 | Illinois |
| Cymraeg | cym-000 | Illinois |
| dansk | dan-000 | Illinois |
| Deutsch | deu-000 | Illinois |
| Zazaki | diq-000 | İllinois |
| eesti | ekk-000 | Illinois |
| ελληνικά | ell-000 | Ιλλινόις |
| Ellinika | ell-003 | Ilinoi |
| English | eng-000 | IL |
| English | eng-000 | Land of Lincoln |
| English | eng-000 | Prairie State |
| Esperanto | epo-000 | Ilinojo |
| Esperanto | epo-000 | Ilinojso |
| Esperanto | epo-000 | Illinojso |
| Iñupiat | esi-000 | Illinois |
| euskara | eus-000 | Illinois |
| suomi | fin-000 | IL |
| suomi | fin-000 | Illinois |
| suomi | fin-000 | Land of Lincoln |
| suomi | fin-000 | illinois |
| suomi | fin-000 | preeriaosavaltio |
| français | fra-000 | IL |
| français | fra-000 | Illinois |
| français | fra-000 | Joliet |
| français | fra-000 | Naperville |
| français | fra-000 | il |
| lenga arpitana | frp-000 | Illinois |
| Gàidhlig | gla-000 | Illinois |
| Gaeilge | gle-000 | Illinois |
| galego | glg-000 | IL |
| galego | glg-000 | Illinois |
| Schwizerdütsch | gsw-000 | Illinois |
| kreyòl ayisyen | hat-000 | Ilinwa |
| kreyòl ayisyen | hat-000 | Illinwa |
| ʻōlelo Hawaiʻi | haw-000 | ʻIlinoe |
| ʻōlelo Hawaiʻi | haw-000 | ‘Ilinoe |
| Srpskohrvatski | hbs-001 | Illinois |
| עברית | heb-000 | אילינוי |
| हिन्दी | hin-000 | इलिनॉय |
| हिन्दी | hin-000 | इलीनोईस |
| hrvatski | hrv-000 | Illinois |
| magyar | hun-000 | Illinois |
| արևելահայերեն | hye-000 | Իլինոյս |
| Ido | ido-000 | Illinois |
| ᐃᓄᒃᑎᑐᑦ | iku-000 | ᐄᓚᓄᐃᔅ |
| ᐃᓄᒃᑎᑐᑦ | iku-000 | ᐄᓚᓄᐃᔅ/iilanuis |
| bahasa Indonesia | ind-000 | Illinois |
| bahasa Indonesia | ind-000 | Prairie State |
| íslenska | isl-000 | Illinois |
| italiano | ita-000 | Illinois |
| 日本語 | jpn-000 | イリノイ |
| 日本語 | jpn-000 | イリノイ州 |
| 日本語 | jpn-000 | リンカーンの地 |
| 日本語 | jpn-000 | 平原の州 |
| にほんご | jpn-002 | イリノイしゅう |
| ქართული | kat-000 | ილინოისი |
| қазақ | kaz-000 | Иллинойс |
| ភាសាខ្មែរ | khm-000 | អ៊ីលីណយ |
| Kurmancî | kmr-000 | Illinois |
| 한국어 | kor-000 | 일리노이 |
| 한국어 | kor-000 | 일리노이 주 |
| Ladino | lad-001 | Illinois |
| latine | lat-000 | Illinoesia |
| lengua lígure | lij-000 | Illinois |
| Limburgs | lim-000 | Illinois |
| lietuvių | lit-000 | Ilinojus |
| lietuvių | lit-000 | Illinojus |
| latviešu | lvs-000 | Ilinoisa |
| latviešu | lvs-000 | Illinoisa |
| മലയാളം | mal-000 | ഇല്ലിനോയി |
| मराठी | mar-000 | इलिनॉय |
| македонски | mkd-000 | Илиниос |
| македонски | mkd-000 | Илиноис |
| македонски | mkd-000 | Илионис |
| reo Māori | mri-000 | Illinois |
| Tâi-gí | nan-003 | I-lī-lo̍k |
| Bân-lâm-gú | nan-005 | Illinois |
| Diné bizaad | nav-000 | Tó Nitsaa Nílį́bąąh Hahoodzo |
| Diné bizaad | nav-000 | Ílínóo hahoodzo |
| Plattdüütsch | nds-000 | Illinois |
| Plattdüütsch-Neddersassisch | nds-002 | Illinois |
| Nederlands | nld-000 | Illinois |
| nynorsk | nno-000 | Illinois |
| bokmål | nob-000 | Illinois |
| occitan | oci-000 | Illinois |
| ирон ӕвзаг | oss-000 | Иллинойс |
| Amanung Sisuan | pam-000 | Illinois |
| فارسی | pes-000 | ایلینوی |
| فارسی | pes-000 | ایلینوییس |
| lenga piemontèisa | pms-000 | Illinois |
| polski | pol-000 | Illinois |
| português | por-000 | Ilinóis |
| português | por-000 | Illinois |
| português | por-000 | Illinóis |
| Bodéwadmimwen | pot-000 | Zhegagoynak |
| română | ron-000 | Illinois |
| русский | rus-000 | Иллино́йс |
| русский | rus-000 | Иллинойс |
| русский | rus-000 | иллинойс |
| русский | rus-000 | индеец иллинойсов |
| русский | rus-000 | язык иллинойс |
| russkij | rus-001 | Illinojs |
| lingua siciliana | scn-000 | Illinois |
| Žemaitiu | sgs-000 | Ėlėnojos |
| slovenčina | slk-000 | Illinois |
| slovenščina | slv-000 | IL |
| slovenščina | slv-000 | Illinois |
| español | spa-000 | Illinois |
| shqip | sqi-000 | Illinois |
| српски | srp-000 | Илиноис |
| srpski | srp-001 | Ilinois |
| svenska | swe-000 | Illinois |
| Kiswahili | swh-000 | Illinois |
| தமிழ் | tam-000 | இலினொய் |
| தமிழ் | tam-000 | இலினொய்ஸ் |
| ภาษาไทย | tha-000 | ชาวอิลลินอยส์ |
| ภาษาไทย | tha-000 | ภาษาอิลลินอยส์ |
| ภาษาไทย | tha-000 | มลรัฐอิลลินอยส์ |
| ภาษาไทย | tha-000 | รัฐอิลลินอยล์ของสหรัฐอเมริกา |
| ภาษาไทย | tha-000 | รัฐอิลลินอยส์ |
| ภาษาไทย | tha-000 | อิลลินอยส์ |
| Türkçe | tur-000 | Illinois |
| Talossan | tzl-000 | Idinois |
| Talossan | tzl-000 | Idinol |
| Uyghurche | uig-001 | Illinoyiz |
| українська | ukr-000 | Іллінойс |
| اردو | urd-000 | الینوائے |
| oʻzbek | uzn-000 | Illinoys |
| tiếng Việt | vie-000 | Illinois |
| Volapük | vol-000 | Illinois |
| ייִדיש | ydd-000 | אילינויעס |
| Bahasa Malaysia | zsm-000 | Illinois |
| Bahasa Malaysia | zsm-000 | Prairie State |