This is part of #779 and the same as https://www.drupal.org/node/1513054
Contrary to #933, which is about making title a proper Field API field (which is what the Title module does) and which we determined that can only happen in Backdrop 2.x, this issue here is to simply move things around, and sorta "fake" the title being a Field API field (what the Title field UI and Title Display modules seem to be doing).
After implementing this, we could loose the whole "submission settings" tab by moving the "Explanation or submission guidelines" text field out of the tab set and under the content type "Description" text field.
Recent comments
When there are thousands of links to be listed, it is better to split the map. Otherwise, hreflang is a good choice.
xmlsitemap module generates wrong links for languages
I don't fully understand why someone would need multiple sitemaps for different languages, but you certainly know better. Good luck!
xmlsitemap module generates wrong links for languages
Easy xml sitemap doesnt seem to offer multiple sitemaps for different languages, otherwise it seems a good solution for a single sitemap but then it doesnt make sense to exclude languages at all...
xmlsitemap module generates wrong links for languages