European Languages:
* French: Bonne journée (formal) or Passe une bonne journée (informal)
* Spanish: Que tengas un buen día (formal) or Que pases un buen día (informal)
* Italian: Buona giornata (formal) or Buona giornata a te (informal)
* German: Einen schönen Tag (formal) or Hab einen schönen Tag (informal)
* Portuguese: Tenha um bom dia (formal) or Bom dia (informal)
* Russian: Хорошего дня (Khoroshego dnya)
* Polish: Miłego dnia (formal) or Dobrego dnia (informal)
* Dutch: Goede dag (formal) or Prettige dag (informal)
* Swedish: Ha en bra dag (formal) or Trevlig dag (informal)
Asian Languages:
* Japanese: よい一日を (yoi ichinichi o) - literally means "Have a good day"
* Chinese (Mandarin): 祝你今天过得愉快 (zhù nǐ jīntiān guò de yúkuài) - literally means "Wish you have a happy day"
* Korean: 좋은 하루 보내세요 (joheun haru bonaeseo) - literally means "Have a good day"
* Hindi: शुभ दिन (shubh din) - literally means "Good day"
Other Languages:
* Arabic: يوم سعيد (Yawm sa'eed) - literally means "Happy day"
* Hebrew: יום טוב (Yom tov) - literally means "Good day"
* Turkish: Güzel günler (Güzel günler) - literally means "Beautiful days"
Remember that these are just a few examples and there might be other ways to say "have a nice day" in different languages. It's always a good idea to learn more about the specific language and culture you're interested in.