| bahasa Indonesia | ind-000 |
| Bahasa purba | |
| brezhoneg | bre-000 | Kentyezh |
| български | bul-000 | Праезик |
| català | cat-000 | Protolengua |
| čeština | ces-000 | Prajazyk |
| dansk | dan-000 | Ursprog |
| Deutsch | deu-000 | Protosprache |
| Deutsch | deu-000 | Ursprache |
| eesti | ekk-000 | Algkeel |
| ελληνικά | ell-000 | Πρωτογλώσσα |
| English | eng-000 | proto-language |
| Esperanto | epo-000 | Pralingvo |
| suomi | fin-000 | Kantakieli |
| français | fra-000 | proto-langue |
| עברית | heb-000 | עברית |
| italiano | ita-000 | protolingua |
| 日本語 | jpn-000 | 祖語 |
| 한국어 | kor-000 | 조상 언어 |
| Kölsch | ksh-000 | Prottoschprooch |
| Kölsch | ksh-000 | Uurschprooch |