The literal translation is 'In Search of List Time'. The Shakesperian title was used upon its first English translation by Moncrfieff. It's lovely but not accurate.
You're right. Moncrieff was in contact with Proust, and I thought Proust had approved this. (It was the third English translation, as you know.)
But apparently I misremembered and it was just the opposite, and Proust felt it missed the mark as well.
Memory is a funny thing. I need a madeleine.