| Part of speech | unknown part of speech |
|---|
| Nominative | Helio |
|---|---|
| Accusative | Helion |
| Catalan | Hèlios |
|---|---|
| Czech | Hélios |
| Danish | Helios |
| Dutch | Helios |
| English | Helios |
| Finnish | Helios |
| French | Hélios |
| German | Helios |
| Greek | Ήλιος |
| Greek (Old Greek) | Ἥλιος |
| Hungarian | Héliosz |
| Icelandic | Helíos |
| Italian | Elio |
| Latin | Helius |
| Malay | Helios |
| Norwegian | Helios |
| Polish | Helios |
| Portuguese | Hélio |
| Romanian | Helios |
| Russian | Гелиос |
| Spanish | Helios |
| Swedish | Helios |
| Turkish | Helios |
| Welsh | Helios |
| West Frisian | Helios |