What is the hyperbole in The Brothers Menaechmus?
A Hyperbole is an extreme exaggeration used in literature to heighten the effect of the passage or even to evoke humor.
Plautus used many themes in The Brothers Menaechmus, and even caught Shakespeare's attention to the point that the Bard used Plautaus' play as an inspiration for "A Comedy of Errors."
It has been a long time since I've read The Brothers Menaechmus, but it seems that the hyperbole would be in the mistaken identities and all the outwitting of others in the play. Look for comparisons that could not possibly be literally true which either make you laugh or make you see more clearly an absurd aspect of someone's personality or character.