| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | fuko | fukoj |
| Accusative | fukon | fukojn |
| Catalan | fucus |
|---|---|
| Dutch | blaaswier; bruinwier; zeewier |
| English | wrack; kelp; brown alga |
| Faeroese | tari |
| Finnish | ruskolevä |
| French | goémon; varech |
| German | Tang |
| Spanish | fuco; sargazo |