;; does not work for all, but good enough
;; find [...] -exec grep --color=auto -n --null -E -A1 -B1 \\\(/en-US/\[\^d\] /dev/null \{\} +
;; 53 results

((markdown-mode
  . ((markdown-hide-urls . t)
     (markdown-translate-filename-function
      . (lambda (file)
          (concat (project-root (project-current)) "files"
                  (replace-regexp-in-string "/en-us/docs" "/en-us"
                                            (downcase file))
                  "/index.md"))))))