Welcome to the Q&A Forum
Browse the forum for helpful insights and fresh discussions about all things SEO.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
I would avoid trying to get links from off language sites as there is a greater chance, that even if relevant, those links will be considered spam links by search engines. Now if you have multiple language tags onto your site (but no url changes) then you may be ok, but if your content is only in one language, you should try to get links from sites also in that language.
The point of a sitemap is to tell Google what is on your site so it can index it easier. There is no way, nor any reason why you would want to put external urls onto your sitemap.