| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | cirkulero | cirkuleroj |
| Accusative | cirkuleron | cirkulerojn |
| Catalan | circular |
|---|---|
| Czech | cirkulář; oběžník |
| Dutch | circulaire; rondschrijven; omzendbrief |
| English | circular |
| French | circulaire |
| German | Rundschreiben; Zirkular |
| Portuguese | circular |
| Saterland Frisian | Rundschrieuwen; Rundskrieuwen; Zirkular |
| Spanish | circular |