How to say thank you in Persian
Persian has a short, friendly thank-you and several warmer ones, and choosing the right one is part of sounding natural.
The quickest thank-you is merci مرسی, borrowed from French and used constantly in everyday Iranian speech. It is casual, friendly, and completely normal.
Mamnoon and moteshakkeram
Mamnoon ممنون and mamnoonam ممنونم both mean thank you. For more weight, say kheyli mamnoon خیلی ممنون, thanks a lot. The most formal option is moteshakkeram متشکرم.
Thanking someone for effort
When someone cooks, helps, or goes out of their way, dastet dard nakone دستت درد نکنه (may your hand not hurt) is warmer than a plain thank-you. Lotf kardi لطف کردی means "you were kind."
How to say you are welcome
The standard reply is khahesh mikonam خواهش میکنم. You will also hear kari nakardam (I didn't do anything) as a modest, tarof-flavoured response.
For most situations, merci or mamnoon is enough. Save dastet dard nakone for real effort, and you will sound like you understand the difference.