It is beneficial for a translator to rate similar translators negatively, especially with languages for which very few translators exist (for example, my native

It is beneficial for a translator to rate similar translators negatively, especially with languages for which very few translators exist (for example, my native language Dutch has 5 translators at the moment), which creates a new problem. You'll probably get the best quality by letting N translators translate a certain text, and let another translator select the best match, all anonymously of course.