| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | efekto | efektoj |
| Accusative | efekton | efektojn |
| Catalan | efecte |
|---|---|
| Czech | dojem; efekt; působení; následek; účinek; účinnost; vliv; výsledek |
| Dutch | effect; indruk |
| English | effect; impression |
| Finnish | teho |
| French | effet; impression |
| German | Effekt; Wirkung; Auswirkung; Eindruck |
| Portuguese | efeito; impressão |
| Saterland Frisian | Effekt; Wierkenge |
| Spanish | efecto |