Formal:
* خوش شانس (khosh shans): This is the most common and literal translation of "lucky" and is suitable for most situations.
Informal:
* شانس دار (shans dar): This is a more informal way to say "lucky" and is commonly used in everyday conversation.
Other options:
* بخت یار (bakht yar): This literally means "fate is with you" and implies good fortune or luck.
* موفق (movafagh): This means "successful" and can be used to express luck or good fortune.
The best way to choose the right word depends on the specific situation and your desired level of formality.