| Part of speech | common noun |
|---|---|
| Hyphenation | bu·o |
| Singular | Plural | |
|---|---|---|
| Nominative | buo | buoj |
| Accusative | buon | buojn |
| Dutch | baak; baken; boei; ton |
|---|---|
| English | buoy |
| Faeroese | boya; dupul |
| Finnish | poiju |
| French | balise |
| German | Boje; Seezeichen; Bake |
| Papiamento | bui |
| Portuguese | bóia |
| Russian | буй |
| Spanish | boya |
| West Frisian | beaken; boei |