| Part of speech | common noun |
|---|---|
| Gender | feminine |
| Singular | Plural | |
|---|---|---|
| Nominative | Fledermaus | Fledermäuse |
| Genitive | Fledermaus | Fledermäuse |
| Dative | Fledermaus | Fledermäusen |
| Accusative | Fledermaus | Fledermäuse |
| Afrikaans | vlermuis |
|---|---|
| Catalan | ratpenat |
| Czech | netopýr |
| Danish | flagermus |
| Dutch | vleermuis |
| English | bat |
| Esperanto | vesperto; ĥiroptero; kiroptero |
| Faeroese | flogmús |
| Finnish | lepakko |
| French | chauve‐souris |
| Greek | νυκτερίδα; νυχτερίδα |
| Italian | pipistrello |
| Latin | vespertilio |
| Norwegian | flaggermus |
| Papiamento | raton di anochi |
| Portuguese | morcego |
| Saterland Frisian | Fläddermuus |
| Spanish | murciélago |
| Sranan | fremusu |
| Swedish | flädermus; läderlapp; fladdermus |
| Thai | ค้างคาว |
| Welsh | ystlum |
| West Frisian | flearmûs |