Some comment on how that works

config.yaml

@@ -18,6 +18,11 @@ languages:
   da:
     title: data.coop
     weight: 1    
+    # First Hugo looks in your post front matter for an images value (images: [""])
+    # Then Hugo searchs for image page resources with feature, cover or thumbnail in their name. These are images files under a directory that matches the post (e.g. content\posts\first-post)
+    # If not images are found, Hugo looks for images (images: [""]) in your site config
+    # If no image if found, then an image-less Twitter summary card is used instead of summary_large_image
+    # https://digitaldrummerj.me/hugo-preview-when-sharing-twitter/
     images: ["/static/img/some_card_preview_large_en.png"]
     LanguageName: Dansk
     menu: