[Prudence]

Yeah - he should remember that Shakespeare isn't some mythical foreign language - it's English. The comedies in particular aren't supposed to be inaccessible mumbo-jumbo - they're jolly good bawdy fun. So yeah, he should know what the character's saying - not just memorize the words in order.

And yay! Midsummer has many great male parts.

So anyhow - he'll likely have to read lines for the audition. Does he know what parts interest him? Also, it's fun even if you don't have a major role. As a parent, particularly a male parent, there's a chance they'll try to rope you into constructing things.

Oh, and encourage him tons.