Romance Languages:
* Spanish: Sombra
* French: Ombre
* Italian: Ombra
* Portuguese: Sombra
* Romanian: Umbre
Germanic Languages:
* German: Schatten
* Dutch: Schaduw
* Swedish: Skugga
* Norwegian: Skygge
* Danish: Skygge
Slavic Languages:
* Russian: Тень (ten')
* Polish: Cień
* Czech: Stín
* Ukrainian: Тінь (tin')
* Bulgarian: Сянка (syanka)
Other Languages:
* Chinese: 阴影 (yǐn yǐng)
* Japanese: 影 (kage)
* Korean: 그림자 (geurimja)
* Arabic: ظل (ẓil)
* Hindi: छाया (chāyā)
* Greek: Σκιά (skiá)
This is not an exhaustive list, but it gives you a good starting point for finding the word "shadow" in other languages.