In our elite "advanced" English class, the teacher got special permission from the Principal to have us read, among others, Canterbury Tales, selections including all the bawdy ones, and Rabelais. So we got Chaucer, Rablais, but not Balzac.
I remember reading Macbeth from our textbook in class and our teacher becoming incensed seeing the word "wench" printed, where Shakespeare had used "whore".
In our Latin text, one of the Metamorphoses of Ovid had a footnote instructing us to "Translate this as 'his wife'", presumably so we wouldn't look up the words and find out they meant "bed partner".