| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | nigrakola | nigrakolaj |
| Accusative | nigrakolan | nigrakolajn |
| Catalan | de coll negre |
|---|---|
| Dutch | zwarthals‐ |
| English | black‐necked swan; black‐necked |
| French | à cou noir |
| German | Schwarzhals‐ |
| Norwegian | svarthals‐ |
| Russian | черношейный |
| Spanish | cuellinegro |
| Swedish | svarthalsad |
| West Frisian | swartnekke‐ |