| Part of speech | common noun |
|---|---|
| Hyphenation | pro·te·in·o |
| Singular | Plural | |
|---|---|---|
| Nominative | proteino | proteinoj |
| Accusative | proteinon | proteinojn |
| Afrikaans | proteïne |
|---|---|
| Dutch | eiwit; proteïne |
| English | protein |
| French | protéine |
| Italian | proteina |
| Papiamento | proteina |
| Portuguese | proteína |
| Spanish | proteína |
| Turkish | protein |
| West Frisian | aaiwyt |