| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | koncepto | konceptoj |
| Accusative | koncepton | konceptojn |
| Catalan | concepte |
|---|---|
| Danish | begreb; opfattelse |
| Dutch | begrip; opvatting |
| English | concept |
| Faeroese | áskoðan; hugtak |
| German | Konzept; Konzeption; Auffassung |
| Icelandic | álit |
| Low German | begrip; begreap |
| Norwegian | oppfatning |
| Papiamento | konsepto |
| Portuguese | conceito; ideia |
| Saterland Frisian | Konzept; Meenenge |
| Spanish | idea; noción |
| Swedish | koncept |