| Sambahsa-mundialect | art-288 |
| necessar | |
| Lingwa de Planeta | art-287 | nesese |
| Deutsch | deu-000 | erforderlich |
| Deutsch | deu-000 | notwendig |
| English | eng-000 | necessary |
| English | eng-000 | needed |
| English | eng-000 | required |
| Esperanto | epo-000 | bezonata |
| Esperanto | epo-000 | necesa |
| français | fra-000 | nécessaire |
| Nederlands | nld-000 | noodig |
| Novial | nov-000 | nesesar |
| русский | rus-000 | необходимый |
| español | spa-000 | necesario |