| Esperanto | epo-000 |
| nevarianta | |
| Lingwa de Planeta | art-287 | konstante |
| Lingwa de Planeta | art-287 | stay |
| Sambahsa-mundialect | art-288 | constant |
| Deutsch | deu-000 | beständig |
| English | eng-000 | constant |
| English | eng-000 | invariant |
| English | eng-000 | stable |
| Esperanto | epo-000 | konstanta |
| Esperanto | epo-000 | stabila |
| Nederlands | nld-000 | constant |
| Nederlands | nld-000 | standvastig |
| Novial | nov-000 | konstanti |
| русский | rus-000 | неизменный |
| русский | rus-000 | постоянный |