| Esperanto | epo-000 |
| duopolo | |
| беларуская | bel-000 | дуаполія |
| català | cat-000 | duopoli |
| Deutsch | deu-000 | Duopol |
| English | eng-000 | duopoly |
| français | fra-000 | duopole |
| magyar | hun-000 | duopólium |
| italiano | ita-000 | duopòlio |
| polski | pol-000 | duopol |
| português | por-000 | duopólio |
| русский | rus-000 | дуополия |
| español | spa-000 | duopolio |