Why do pages translated into different languages each have different rankings in their respective engines?
Google looks at content on a URL-by-URL basis, so even if you have translated top content from one language to another, Google might not treat it the same way as they would treat the original content. It’s also possible that the translated content is not as relevant as other original content in that language. Generally speaking, making sure that your content is as unique and compelling as possible for the users in that target market is the best thing to do.