If you write a novel and it's a success and you have it released in 15 or 20 other countries, it means 15 or 20 translators have done their work and let the novel go through their brains before the release. They are mentioned for their work, they get paid for it, they might contribute, they even might make the book better with their translation when they are gifted skilled and motivated, but the author is still the author. If a translator doesn't agree with these rules, he should stop translating and write his own novels.
LE