| Cymraeg | cym-000 |
| mamiaith | |
| Afrikaans | afr-000 | moedertaal |
| català | cat-000 | llengua materna |
| čeština | ces-000 | mateřský jazyk |
| lingua corsa | cos-000 | lingua materna |
| dansk | dan-000 | modersmål |
| Deutsch | deu-000 | Muttersprache |
| eesti | ekk-000 | emakeel |
| ελληνικά | ell-000 | μητρική γλώσσα |
| English | eng-000 | mother tongue |
| English | eng-000 | mother-tongue |
| English | eng-000 | native language |
| Esperanto | epo-000 | patrina lingvo |
| suomi | fin-000 | äidinkieli |
| français | fra-000 | langue maternelle |
| Frysk | fry-000 | memmetaal |
| Gaeilge | gle-000 | teanga dhúchais |
| galego | glg-000 | lingua materna |
| magyar | hun-000 | anyanyelv |
| italiano | ita-000 | bahasa ibu |
| italiano | ita-000 | madrelingua |
| Kurmancî | kmr-000 | zimanê dayikî |
| Kurmancî | kmr-000 | zimanê zikmakî |
| Limburgs | lim-000 | modertaal |
| lietuvių | lit-000 | gimtoji kalba |
| Lëtzebuergesch | ltz-000 | Mammesprooch |
| Plattdüütsch | nds-000 | Moderspraak |
| Nederlands | nld-000 | moedertaal |
| nynorsk | nno-000 | morsmål |
| bokmål | nob-000 | morsmål |
| فارسی | pes-000 | زبان مادری |
| polski | pol-000 | język ojczysty |
| português | por-000 | língua materna |
| română | ron-000 | limba maternă |
| русский | rus-000 | родной язык |
| slovenščina | slv-000 | materni jezik |
| Soomaaliga | som-000 | luqadda hooyo |
| español | spa-000 | lengua materna |
| svenska | swe-000 | modersmål |
| తెలుగు | tel-000 | అమ్మభాష |
| తెలుగు | tel-000 | మాతృభాష |
| Türkçe | tur-000 | ana dili |
| Türkçe | tur-000 | anadili |