Collapsible blocks for language specific path patterns

Context: The block "node path settings" in the pathauto admin already contains a lot of "inputs" (one per content-type). On a page with say 25 content-types it's already pretty overwhelming. (A solution to that would be to put the pathauto settings for each content-type in the configuration page of said content-type; but that's another story).

Problem: If a site is available in say 10 languages, this page gets even harder to read (over 250 input boxes). It would be great if language specific inputs were grouped in a collapsible block (collapsed by default) below the input content-type to which they belong; a little bit indented to the right would suggest that they are advanced options for the content-type immediately above.

It would be a very small UI improvement, but a good one in my opinion.

I'd volunteer to write the patch if the maintainers believe it'd be a good addition to the module.