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: She slipped quietly into the bookshop, had a quick reconnoiter, and left without purchasing anything.
Relation: contradiction