What is the difference between
Language: Not specified and
Language: Not applicable in Drupal 8 In the context of multilinguality ?
There was no such distinction in Drupal 7 (and 6, IIRC) and it seems to me a bit redundant in comparison to the Drupal 7 method of
Language: Natural vs
Language: name. I also didn't find any documentation about this in a quick Google search about the difference and thought it would be nice if we would have an explanation here.