| Nederlands | nld-000 |
| twijfelaar | |
| Achterhoeks | act-000 | veulerd |
| Deutsch | deu-000 | Zweifler |
| English | eng-000 | doubter |
| English | eng-000 | sceptic |
| English | eng-000 | skeptic |
| Esperanto | epo-000 | dubemulo |
| Limburgs | lim-000 | wumfelaer |
| Nederlands | nld-000 | weifelaar |
| português | por-000 | incrédulo |