"辛苦了"在英语中可以说成 "You've worked hard." 或者 "Thank you for your hard work."
如果你想表达更强烈的感谢或者赞美，可以说 "Thank you so much for your hard work! You really deserve it!"
如果是向某人表示赞扬或者鼓励，可以说 "Keep up the good work! Your hard work is paying off."
如果是对某人说再见并且希望他们继续努力，可以说 "Good luck and keep working hard! We'll see you soon."
