| Part of speech | proper name |
|---|---|
| Hyphenation | Hel·sink·o |
| Nominative | Helsinko |
|---|---|
| Accusative | Helsinkon |
| Catalan | Hèlsinki |
|---|---|
| Czech | Helsinky |
| Dutch | Helsinki |
| English | Helsinki |
| Finnish | Helsinki |
| German | Helsinki |
| Greek | Ελσίνκι |
| Portuguese | Helsínquia |
| Russian | Хельсинки |
| West Frisian | Helsinki |