English by region: lightning bug (Mid-Atlantic US, Midwestern US, Southern US).
In other languages: світляк (Ukrainian), Glühwürmchen (German), luciole (French), luciérnaga (Spanish), świetlik (Polish).
Albanian
xixëllonjë
Arabic
يراعةyarāʕa
Also: حباحب
Aragonese
cuqueta de luz
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Armenian
լուսատտիկlusattik
Also: կայծոռիկ, փոսուռա
Asturian
cocu de lluz
Also: guxán de lluz
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Azerbaijani
işıldaböcək
Basque
euli ipurtargi
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Belarusian
святлякsvjatlják
Also: светлячок, сьвятляк
Bosnian
kresnica≈
Also: krijesnica
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Breton
preñv-lugern
Also: c'hwibu-luc'h
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Bulgarian
светулкаsvetúlka
Catalan
lluerna
Also: cuca de llum
Croatian
kresnica≈
Also: krijesnica
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Czech
světluška
Danish
ildflue
Dutch
glimworm
Also: vuurvlieg
English
firefly/ˈfaɪ.əˌflaɪ/
lightning bug≈
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lightning bug≈
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firefly≈
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lightning bug≈
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firefly≈
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Estonian
jaanimardikas
Finnish
kiiltomato
Also: tulikärpänen
French
luciole
Also: mouche à feu, ver luisant
Galician
vagalume
Also: lucecú, lucerna
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Georgian
ციცინათელაcicinatela
German
Glühwürmchen
Also: Johanniswürmchen, Leuchtkäfer
Greek
πυγολαμπίδαpygolampída
Also: κωλοφωτιά
Hebrew
גַּחְלִילִיתgaẖlilít
Hindi
जुगनूjugnū
Also: खद्योत, ज्योतिरिंगण
Hungarian
szentjánosbogár
Icelandic
eldfluga
Also: blysbjalla, glætufluga
Irish
lampróg
Also: tinechuileog
Italian
lucciola
Japanese
蛍hotaru
Also: ホタル
Kazakh
жарық қоңызjarıq qoŋız
Korean
개똥벌레gaettongbeolle
Also: 반딧불, 반딧불이
Latin
cicindela
Latvian
jāņtārpiņš
Ligurian
ciæbèlla
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Lithuanian
jonvabalis
Also: žibukas
Macedonian
светулкаsvetulka
Mongolian
гэрэлтдэг цохgereltdeg cox
Also: ᠭᠡᠷᠡᠯᠲᠦᠳᠡᠭ ᠴᠣᠬᠤ
Neapolitan
luceluce
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Norwegian Bokmål
ildflue
Also: lysbille
Occitan
lucèrna
Also: luciòla, luscambra
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Persian
کرم شبتابkerm-e šab-tâb
Piedmontese
lusentela
Also: lusariòla
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Polish
świetlik
Also: robaczek świętojański
Portuguese
vaga-lume
Also: pirilampo, vagalume
Romanian
licurici
Russian
светлякsvetlják
Also: светлячок
Serbian
кресница
Also: кријесница
Slovak
svetluška
Slovene
kresnica
Spanish
luciérnaga
Swedish
lysmask
Tajik
кирми шабтобkirm-i šabtob
Turkish
ateş böceği
Ukrainian
світлякsvitlják
Also: світлячок
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Welsh
pryf tân
Also: magïen
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