| polski | pol-000 |
| ochotniczo | |
| bălgarski ezik | bul-001 | dobrovolen |
| dansk | dan-000 | frivillig |
| Deutsch | deu-000 | freiwillig |
| Ellinika | ell-003 | ethelontikós |
| Ellinika | ell-003 | proairetikós |
| English | eng-000 | optionally |
| English | eng-000 | unsolicited |
| English | eng-000 | voluntarily |
| English | eng-000 | voluntary |
| Esperanto | epo-000 | libervola |
| Esperanto | epo-000 | nedeviga |
| Esperanto | epo-000 | propravola |
| Esperanto | epo-000 | volontule |
| suomi | fin-000 | vapaaehtoinen |
| français | fra-000 | bénévole |
| français | fra-000 | bénévolement |
| français | fra-000 | de son plein gré |
| français | fra-000 | facultatif |
| français | fra-000 | spontané |
| français | fra-000 | volontaire |
| magyar | hun-000 | önként |
| magyar | hun-000 | önkéntes |
| íslenska | isl-000 | sjálfviljugur |
| italiano | ita-000 | spontaneo |
| italiano | ita-000 | volontariamente |
| italiano | ita-000 | volontario |
| latine | lat-000 | automatus |
| latine | lat-000 | voluntarius |
| Nederlands | nld-000 | vrijwillig |
| bokmål | nob-000 | frivillig |
| bokmål | nob-000 | godvillig |
| polski | pol-000 | dobrowolnie |
| polski | pol-000 | dobrowolny |
| polski | pol-000 | ochotniczy |
| português | por-000 | espontaneamente |
| português | por-000 | livremente |
| português | por-000 | voluntário |
| română | ron-000 | voluntar |
| russkij | rus-001 | dobrowol'no |
| russkij | rus-001 | dobrowol'nyj |
| slovenčina | slk-000 | dobrovoľný |
| español | spa-000 | a voluntad |
| español | spa-000 | voluntariamente |
| español | spa-000 | voluntario |
| svenska | swe-000 | frivillig |
| Türkçe | tur-000 | gönüllü |