| Nederlands | nld-000 |
| tema | |
| Lingwa de Planeta | art-287 | tema |
| Sambahsa-mundialect | art-288 | theme |
| Deutsch | deu-000 | Thema |
| English | eng-000 | subject |
| English | eng-000 | topic of discussion |
| Esperanto | epo-000 | temo |
| Nederlands | nld-000 | onderwerp |
| Novial | nov-000 | subjekte |
| русский | rus-000 | тема |