| la lojban. | jbo-000 |
| beldjym | |
| Afrikaans | afr-000 | België |
| አማርኛ | amh-000 | ቤልጅግ |
| Englisce sprǣc | ang-000 | Belgice |
| العربية | arb-000 | بلجيكا |
| Classical Arabic—ASJP | arb-001 | Bilğīkā |
| ארמית | arc-000 | ܒܠܓܝܟܐ |
| luenga aragonesa | arg-000 | Belchica |
| asturianu | ast-000 | Bélxica |
| Aymara | aym-000 | Bilkiya |
| azərbaycanca | azj-000 | Belçika |
| boarisch | bar-000 | Belgien |
| беларуская | bel-000 | Бельгія |
| বাংলা | ben-000 | বেলজিয়াম |
| བོད་སྐད་ | bod-000 | པེར་ཅིན |
| bosanski | bos-000 | Belgija |
| brezhoneg | bre-000 | Belgia |
| български | bul-000 | Белгия |
| bălgarski ezik | bul-001 | Belgija |
| català | cat-000 | Bèlgica |
| binisayang Sinugboanon | ceb-000 | Belhika |
| čeština | ces-000 | Belgie |
| нохчийн мотт | che-000 | Бельгий |
| чӑваш | chv-000 | Бельги |
| Çăvaşla | chv-001 | Belgi |
| 普通话 | cmn-000 | 比利时 |
| Hànyǔ | cmn-003 | Bǐlìshí |
| Kernowek | cor-000 | Pow Belg |
| kaszëbsczi jãzëk | csb-000 | Belgijskô |
| Cymraeg | cym-000 | Gwlad Belg |
| dansk | dan-000 | Belgien |
| Deutsch | deu-000 | Belgien |
| Zazaki | diq-000 | Belçıka |
| eesti | ekk-000 | Belgia |
| ελληνικά | ell-000 | Βέλγιο |
| Ellinika | ell-003 | Vélgio, Vélyio |
| English | eng-000 | Belgium |
| Esperanto | epo-000 | Belgio |
| euskara | eus-000 | Belgika |
| suomi | fin-000 | Belgia |
| français | fra-000 | Belgique |
| lenga arpitana | frp-000 | Bèlg·ique |
| Frysk | fry-000 | Belgje |
| lenghe furlane | fur-000 | Belgjiche |
| lenghe furlane | fur-000 | Belgjo |
| Gàidhlig | gla-000 | A' Bheilg |
| Gaeilge | gle-000 | An Bheilg |
| galego | glg-000 | Bélxica |
| yn Ghaelg | glv-000 | Yn Velg |
| Schwizerdütsch | gsw-000 | Belgien |
| kreyòl ayisyen | hat-000 | Bèljik |
| Srpskohrvatski | hbs-001 | Belgija |
| עברית | heb-000 | בלגיה |
| ISO 259-3 | heb-001 | Belgiyah |
| hrvatski | hrv-000 | Belgija |
| hornjoserbšćina | hsb-000 | Belgiska |
| magyar | hun-000 | Belgium |
| արևելահայերեն | hye-000 | Բելգիա |
| hyw-001 | Belgia | |
| Ido | ido-000 | Belgia |
| Iloko | ilo-000 | Belgium |
| interlingua | ina-000 | Belgica |
| bahasa Indonesia | ind-000 | Belgia |
| íslenska | isl-000 | Belgía |
| italiano | ita-000 | Belgio |
| basa Jawa | jav-000 | Belgia |
| la lojban. | jbo-000 | camgu'e |
| 日本語 | jpn-000 | ベルギー |
| Nihongo | jpn-001 | Berugī |
| ქართული | kat-000 | ბელგია |
| Kartuli | kat-001 | belgia |
| қазақ | kaz-000 | Белгия |
| Mongol khel | khk-001 | Belgium |
| Kurmancî | kmr-000 | Belçîka |
| 한국어 | kor-000 | 벨기에 |
| Hangungmal | kor-001 | Belgie |
| Kölsch | ksh-000 | Belljie |
| latine | lat-000 | Belgia |
| latine | lat-000 | Belgium |
| lengua lígure | lij-000 | Belgiò |
| Limburgs | lim-000 | Belsj |
| Limburgs | lim-000 | Bèlsj |
| lingála | lin-000 | Bɛ́ljika |
| lietuvių | lit-000 | Belgija |
| Lëtzebuergesch | ltz-000 | Belsch |
| latviešu | lvs-000 | Beļģija |
| മലയാളം | mal-000 | ബെല്ജിയം |
| मराठी | mar-000 | बेल्जियम |
| македонски | mkd-000 | Белгија |
| Makedonski jazik | mkd-001 | Belgija |
| Bân-lâm-gú | nan-005 | Belgien |
| napulitano | nap-000 | Belge |
| dorerin Naoero | nau-000 | Belgium |
| Nāhuatlahtōlli | nci-000 | Belxicān |
| Plattdüütsch-Neddersassisch | nds-002 | Belgien |
| Nederlands | nld-000 | België |
| nynorsk | nno-000 | Belgia |
| bokmål | nob-000 | Belgia |
| Novial | nov-000 | Belgia |
| नेपाली | npi-000 | बेल्जियम |
| occitan | oci-000 | Belgica |
| ирон ӕвзаг | oss-000 | Бельги |
| Amanung Sisuan | pam-000 | Belgium |
| Papiamentu | pap-000 | Bélgika |
| پښتو ژبه | pbu-000 | بلجيم |
| فارسی | pes-000 | بلژیک |
| lenga piemontèisa | pms-000 | Belgi |
| polski | pol-000 | Belgia |
| português | por-000 | Bélgica |
| Qusqu qhichwa simi | quz-000 | Bilhika |
| lingua rumantscha | roh-000 | Belgia |
| română | ron-000 | Belgia |
| limba armãneascã | rup-000 | Belghia |
| русский | rus-000 | Бельгия |
| russkij | rus-001 | Belgija |
| संस्कृतम् | san-000 | बेल्जियम |
| saṃskṛtam | san-001 | Beljiyama |
| lingua siciliana | scn-000 | Belgiu |
| Scots leid | sco-000 | Belgium |
| slovenčina | slk-000 | Belgicko |
| slovenščina | slv-000 | Belgija |
| davvisámegiella | sme-000 | Belgia |
| español | spa-000 | Bélgica |
| shqip | sqi-000 | Belgjika |
| shqip | sqi-000 | Belgjikë |
| српски | srp-000 | Белгија |
| srpski | srp-001 | Belgija |
| svenska | swe-000 | Belgien |
| Kiswahili | swh-000 | Ubelgiji |
| தமிழ் | tam-000 | பெல்ஜியம் |
| tamiḻ | tam-002 | Peljiyam |
| lia-tetun | tet-000 | Béljika |
| тоҷикӣ | tgk-000 | Белгия |
| Tagalog | tgl-000 | Belhika |
| ภาษาไทย | tha-000 | ประเทศเบลเยียม |
| ภาษาไทย | tha-000 | เบลเยียม |
| Tok Pisin | tpi-000 | Belsum |
| Türkçe | tur-000 | Belçika |
| ئۇيغۇرچە | uig-000 | بېلگىيە |
| українська | ukr-000 | Бельгія |
| Latynytsia | ukr-001 | Belhija |
| oʻzbek | uzn-000 | Belgiya |
| łéngua vèneta | vec-000 | Belgio |
| tiếng Việt | vie-000 | Bỉ |
| Vlaams | vls-000 | België |
| Volapük | vol-000 | Belgän |
| võro kiil | vro-000 | Belgiä |
| Winaray | war-000 | Belhika |
| lingaedje walon | wln-000 | Beldjike |
| ייִדיש | ydd-000 | בעלגיע |
| 廣東話 | yue-000 | 比利時 |
| Bahasa Malaysia | zsm-000 | Belgium |