Formal:
* انشاءالله (Insha'Allah) - This is the most common and formal way to say "God willing." It literally translates to "If God wills it."
Informal:
* به امید خدا (Be Omid-e Khoda) - This means "with the hope of God" and is more informal than "Insha'Allah."
* خدا بخواد (Khoda Bekhavad) - This literally means "God wants it" and is even more informal than the previous options.
Note: It's important to choose the appropriate expression based on the context and your relationship with the person you are talking to.
Example sentences:
* انشاءالله فردا میرم مسافرت. (Insha'Allah, I'll go on a trip tomorrow.)
* به امید خدا همه چیز خوب میشه. (Be Omid-e Khoda, everything will be fine.)
* خدا بخواد هفته آینده میبینمت. (Khoda Bekhavad, I'll see you next week.)