| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | fenomeno | fenomenoj |
| Accusative | fenomenon | fenomenojn |
| Albanian | fenomen |
|---|---|
| Catalan | fenòmen; fenomen |
| Czech | fenomén; jev; úkaz; zjev |
| Dutch | fenomeen; verschijnsel; zeldzaam verschijnsel |
| English | phenomenon |
| Faeroese | fyribrigdi |
| Finnish | ilmiö |
| French | phénomène |
| German | Phänomen; Naturerscheinung; Erscheinung |
| Greek | φαινόμενο |
| Low German | verskynsel |
| Papiamento | fenómeno |
| Portuguese | fenómeno |
| Saterland Frisian | Natuurärschienenge; Natuurärskienenge |
| Spanish | fenómeno |
| Swedish | fenomen |
| Welsh | ffenomen |