Romance Languages:
* Spanish: Hermana
* Italian: Sorella
* French: Sœur
* Portuguese: Irmã
* Romanian: Soră
Germanic Languages:
* German: Schwester
* Dutch: Zuster
* Swedish: Syster
* Norwegian: Søster
* Danish: Søster
* Icelandic: Systir
Slavic Languages:
* Russian: Сестра (Sestra)
* Polish: Siostra
* Czech: Sestra
* Ukrainian: Сестра (Sestra)
* Bulgarian: Сестра (Sestra)
* Serbian: Сестра (Sestra)
Other Languages:
* Arabic: أخت (ukht)
* Chinese: 姐姐 (jiějie) [older sister], 妹妹 (mèimei) [younger sister]
* Japanese: 姉妹 (shimai) [sister]
* Korean: 언니 (eonni) [older sister], 동생 (dongsaeng) [younger sister]
* Hindi: बहन (bahan)
* Greek: Αδελφή (Adelfi)
* Turkish: Kardeş (for both brother and sister)
Note: Some languages, like Korean and Chinese, have separate words for older and younger sisters. In other languages, like Turkish, there is one word for both brother and sister.
It is always a good idea to check the specific context and usage of the word in the target language.