Problem/Motivation
The situation, I have a Drupal 8 multilingual node where Dutch is the main language and French is the other.
If I add a comment to the Dutch node translation and approve it, it will show. But it will also show in the French translation.
I think it is rather weird to see a mix of Dutch and French below a Dutch node.
P.S. as a quick workaround I created a view which shows me the comments based on the current node and filtered on a language. But it would be better that this approach is not necessary.
Proposed resolution
Add an option to select the language for show the comments.
Remaining tasks
Add test coverage.
User interface changes
A new option is added in the 'Manage display' tab for the comment which allow to config the language filter to show the comments.
API changes
The language_manager service is now injected to the CommentStorage class.
Data model changes
A new configuration named language_filter is now available to store the language configuration for display the comments.