| Part of speech | common noun |
|---|---|
| Hyphenation | koj·o |
| Singular | Plural | |
|---|---|---|
| Nominative | kojo | kojoj |
| Accusative | kojon | kojojn |
| Czech | kapr koi |
|---|---|
| Dutch | koi; brokaatkarper |
| English | koi |
| Finnish | koikarppi |
| French | carpe koï; koï |
| German | Koi |
| Hungarian | koi ponty |
| Icelandic | koi |
| Italian | carpa koi; koi |
| Malay | koi |
| Norwegian | koi |
| Polish | karp koi |
| Portuguese | koi |
| Russian | капр кои |
| Thai | ปลาแฟนซีคาร์ป |
| Turkish | koi |