Als geflügeltes Wort m.E. am besten so wiedergegeben. Wie der Spruch im Original heißt, kann ja zusätzlich angegeben werden.

EB:

According to the most picturesque legend, it was established to commemorate an incident in which Edward was dancing with Joan of Kent, Countess of Salisbury, when one of her blue garters dropped to the floor. As bystanders snickered, Edward gallantly picked up the garter and put it on his own leg, admonishing the courtiers in French with the phrase that remains as the order's motto “Honi soit qui mal y pense” (“Shame to him who thinks evil of it,” or, more popularly, “Evil to him who evil thinks”). The king inaugurated the order with a great feast and a memorable joust.