Menu simply recursive all folder and file without _index.md with i18n support

support
1

I am trying to make a theme to look like obsidian (https://obsidian.md/).
I want to convert the content of obsidian into static site with hugo.
My content folder won’t have _index.md in each sub folder.
I simply want to convert all my folder into left nevigation menu.
But I still want to support i18n.

Here is the sample of my content folder

content
  en
    folder_1
      page_1_1.md
      page_1_2.md
      folder_1_1
        page_1_1_1.md
        page_1_1_2.md
        folder_1_1_1
          page_1_1_1_1.md
          page_1_1_1_2.md
  fr
    folder_1
      page_1_1.md
      page_1_2.md
      folder_1_1
        page_1_1_1.md
        page_1_1_2.md
        folder_1_1_1
          page_1_1_1_1.md
          page_1_1_1_2.md