"Butterflies," which won the Mario Fratti Award at New York's "In Scena!" theater festival in 2016, has been translated by Carlotta Brentan and directed by Jay Stern in a production at Manhattan's The Tank. It's an earnest endeavor, and the two young women playing the sisters (Annie Watkins as Blonde and Danielle Sacks as Brunette) both give strong performances. The play, though, is talky and overblown. Perhaps Aldro…