| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | harpo | harpoj |
| Accusative | harpon | harpojn |
| Czech | harfa |
|---|---|
| Dutch | harp |
| English | harp |
| English (Old English) | hearpe |
| German | Harfe |
| Latin | harpa |
| Papiamento | arpa; harpa |
| Portuguese | harpa |
| Russian | арфа |
| Saterland Frisian | Harfe |
| Scottish Gaelic | clàrsach |
| Spanish | arpa |
| Swedish | harpa |
| Turkish | harp |
| Welsh | telyn |
| West Frisian | harpe |