Premise: She boldly marched into a bookstore and asked the salesclerk for a copy each of Hemingway's The Sun Come Up Again and Throw Away the Gun and Steinbeck's The Angry Grape .  Is there a term for the errors that creep in while translating a passage back into the original tongue?

Hypothesis: The Angry Grape is an incorrect retranslation; she should have asked for The Wrath of Grapes.
Relation: neutral