Sitemap is not generated properly for Multilingual Pages and Content
When Sitefinity is in multilingual mode and there are more than 1 languages used, the Sitemap Generator creates URLs for the detailed pages of content items as a rel to the URL section when the item is not in the default language. If the item or the page displaying the detailed information about the item is unpublished in the default language, the URLs for the other translations will be removed from the generated sitemap as well.