| svenska | swe-000 |
| serotonin | |
| català | cat-000 | serotonina |
| čeština | ces-000 | serotonin |
| dansk | dan-000 | serotonin |
| Deutsch | deu-000 | Serotonin |
| ελληνικά | ell-000 | σεροτονίνη |
| English | eng-000 | serotonin |
| Esperanto | epo-000 | serotonino |
| suomi | fin-000 | serotoniini |
| français | fra-000 | sérotonine |
| Српскохрватски | hbs-000 | серото̀нӣн |
| Srpskohrvatski | hbs-001 | serotònīn |
| magyar | hun-000 | szerotonin |
| bahasa Indonesia | ind-000 | serotonin |
| íslenska | isl-000 | serótónín |
| italiano | ita-000 | serotonina |
| 日本語 | jpn-000 | セロトニン |
| 한국어 | kor-000 | 세로토닌 |
| lietuvių | lit-000 | serotoninas |
| Nederlands | nld-000 | serotonine |
| polski | pol-000 | serotonina |
| português | por-000 | serotonina |
| română | ron-000 | serotonină |
| русский | rus-000 | серотони́н |
| español | spa-000 | serotonina |