European Languages:
* English: Bye, Goodbye
* French: Au revoir (formal), Salut (informal)
* Spanish: Adiós (formal), Hasta luego (informal)
* German: Auf Wiedersehen (formal), Tschüss (informal)
* Italian: Arrivederci (formal), Ciao (informal)
* Portuguese: Adeus (formal), Até logo (informal)
* Russian: До свидания (Do svidaniya) (formal), Пока (Poka) (informal)
* Dutch: Doei (informal), Tot ziens (formal)
* Swedish: Hej då (informal), Farväl (formal)
* Polish: Do widzenia (formal), Cześć (informal)
Asian Languages:
* Japanese: Sayonara (formal), じゃあね (jaa ne) (informal)
* Chinese (Mandarin): 再见 (zàijiàn) (formal), 拜拜 (bàibai) (informal)
* Korean: 안녕히 계세요 (annyeonghi gyeseyo) (formal), 안녕 (annyeong) (informal)
* Hindi: अलविदा (alvida) (formal), नमस्ते (namaste) (informal)
* Thai: ลาก่อน (laakawn) (formal), บาย (bai) (informal)
Other Languages:
* Arabic: مع السلامة (ma'a al-salama) (formal), سلام (salaam) (informal)
* Hebrew: להתראות (lehitra'ot) (formal), ביי (bai) (informal)
* Turkish: Hoşça kal (formal), Güle güle (informal)
This is just a small sample of the many ways to say "bye" in different languages. The best way to learn how to say "bye" in a specific language is to ask a native speaker or consult a language learning resource.