What does "Revision translation affected" indicate? In views there is a boolean field named Revision translation affected. The description for the field is "Indicates if the last edit of a translation belongs to current revision". To me it is not so clear. What exactly does it mean?

Does it indicate what language that was changed in that revision? And what happens when non-translatable fields are edited?
I found this explanation in code comments:


  If a translation has changes in a certain revision, the translation is
  considered "affected" by that revision, and will be flagged as such
  via the "revision_translation_affected" field.


http://cgit.drupalcode.org/drupal/tree/core/lib/Drupal/Core/Entity/entity.api.php#n102