| Part of speech | common noun |
|---|---|
| Hyphenation | sep·tembr·o |
| Singular | Plural | |
|---|---|---|
| Nominative | septembro | septembroj |
| Accusative | septembron | septembrojn |
| ? | |
|---|---|
| Afrikaans | September |
| Albanian | shtator |
| Catalan | setembre |
| Czech | září |
| Danish | september; fiskemåned |
| Dutch | herfstmaand; september |
| English | September |
| Faeroese | september |
| Finnish | syyskuu |
| French | septembre |
| German | September; Scheiding; Herbstmond; Herbstmonat; Holzmond; Holzmonat; Holzfällmond; Holzfällmonat |
| Greek | Σεπτέμβρης; Σεπτέμβριος |
| Hungarian | szeptember |
| Icelandic | september |
| Italian | settembre |
| Jamaican Patois | Septemba |
| Low German | september; septembermånd; harvstmånd |
| Luxemburgish | September |
| Malay | bulan September; September |
| Mandarin | |
| Norwegian | september |
| Papiamento | sèptèmber |
| Polish | wrzesień |
| Portuguese | Setembro |
| Romanian | septembrie |
| Russian | сентябрь |
| Saterland Frisian | September |
| Scots | September |
| Scottish Gaelic | an t‐Sultainn |
| Spanish | septiembre |
| Swahili | Septemba |
| Swedish | september |
| Tagalog | Setyembre |
| Thai | กันยายน; กันยา |
| Turkish | eylül |
| Welsh | Medi |
| West Frisian | hjerstmaonne; septimber |