See #11453.

That is mostly a good thing.

But it doesn't work if:

• The multilingual site doesn't have image render hooks.
• The multilingual site have Markup formats (e.g. HTML, Asciidoc) that does not support render hooks.

So, I suggest that we extend the front matter build options to look something like this:

[_build]
  list = 'always'
  publishResources = true
  duplicateResourceFiles = true
  render = 'always'

When duplicateResourceFiles = true we copy non-page resources (e.g. foo.png) for the languages without a dedicated version.