| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | kongreso | kongresoj |
| Accusative | kongreson | kongresojn |
| Catalan | congrés |
|---|---|
| Danish | kongres |
| Dutch | congres |
| English | congress; convention |
| Faeroese | ráðstevna; ting |
| French | congrès |
| German | Kongreß; Tagung |
| Italian | congresso |
| Papiamento | kongreso |
| Portuguese | congresso |
| Russian | съезд |
| Saterland Frisian | Kongress |
| Spanish | congreso |
| Swedish | kongress |
| Tagalog | kongreso |
| Turkish | kongre |
| West Frisian | kongres |