| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | ekstravaganco | ekstravagancoj |
| Accusative | ekstravagancon | ekstravagancojn |
| Dutch | buitenissigheid; buitensporigheid; extravagantie |
|---|---|
| English | extravagance |
| Faeroese | óhógv |
| German | Extravaganz; Narrheit; Überspanntheit |
| Portuguese | extravagância |
| Spanish | extravagancia |