| Ido | ido-000 |
| opero | |
| Romániço | art-013 | ópero |
| dansk | dan-000 | opera |
| Deutsch | deu-000 | Oper |
| English | eng-000 | opera |
| Esperanto | epo-000 | opero |
| français | fra-000 | opéra |
| interlingua | ina-000 | opera |
| italiano | ita-000 | opera |
| latviešu | lvs-000 | opera |
| Nederlands | nld-000 | opera |
| polski | pol-000 | opera |
| português | por-000 | ópera |
| русский | rus-000 | опера |
| español | spa-000 | ópera |
| svenska | swe-000 | opera |