| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | kvarko | kvarkoj |
| Accusative | kvarkon | kvarkojn |
| Afrikaans | kwark |
|---|---|
| Dutch | quark |
| English | quark |
| French | quark |
| German | Quark |
| Portuguese | quark |
| Spanish | cuark |
| Swedish | kvark |
| Thai | ควาร์ก |
| Turkish | kuark |
| Welsh | cwarc |
| West Frisian | kwark |