to enjoy oneself, to have a great time, to delight, to treat
Nous voulons régaler le public et montrer ce que nous savons faire, non ?
We want to delight the public and show what we can do, right?
— Funny Games (1997)
I'm going to enjoy myself.
Au lieu de superviser le nettoyage des cendres, tu préfères te régaler ?
Instead of supervising the ash cleanup, would you rather treat yourself?
— Masaan (2015)