| Part of speech | unknown part of speech |
|---|
| Nominative | optimisto |
|---|---|
| Accusative | optimiston |
| Czech | optimista |
|---|---|
| Danish | optimist |
| Dutch | optimist |
| English | optimist |
| German | Optimist |
| Papiamento | optimista |
| Portuguese | otimista |
| Saterland Frisian | Optimist |
| Spanish | optimista |
| Turkish | iyimser |
| Welsh | optimist |