Book translators / authors must have a field day with this. Let's say that a character in book 1 suspects his cousin of committing a murder, and nothing else i

Book translators / authors must have a field day with this. Let's say that a character in book 1 suspects his cousin of committing a murder, and nothing else is revealed about that cousin (let's say it's a side plot) until book 5, where new evidence turns up and he is suddenly found guilty. If you differentiate between male and female cousin, how do you translate book 1 if book 5 hasn't been written yet? Even better, let's assume the books are finished, the author is dead, but you're translating to a language that differentiates between younger/older cousins / cousins on different sides of the family. You just pick whichever word you like more. Ten years later, Hollywood makes a movie adaptation, and the "male cousin" from your translation is played by none other than Angelina Jollie. Your readers are very confused. Translation is hard.