| English | eng-000 |
| special language | |
| ISO 12620 | art-317 | specialLanguage |
| سۆرانی | ckb-000 | زمانی تایبهت |
| 普通话 | cmn-000 | 专用语言 |
| 普通话 | cmn-000 | 特殊语言 |
| 普通话 | cmn-000 | 非通用语言 |
| Deutsch | deu-000 | Fachsprache |
| English | eng-000 | LSP |
| English | eng-000 | language for special purpose |
| English | eng-000 | language for special purposes |
| English | eng-000 | language for specific purposes |
| English | eng-000 | special-purpose language |
| suomi | fin-000 | erikoiskieli |
| français | fra-000 | langue de spécialité |
| italiano | ita-000 | linguaggio tecnico |
| español | spa-000 | lenguaje especializado |
| svenska | swe-000 | fackspråk |