Change record status: 
Project: 
Introduced in branch: 
8.x
Description: 

Comment object language codes used 'language' in Drupal 7, and as part of a standardization effort to change to 'langcode' where the data is not a language object, the comment object was changed as well.

Drupal 7:

<?php
// Figure out the comment language.
$comment = comment_load($cid);
return
$comment->language;
?>

Drupal 8:

<?php
// Figure out the comment language.
$comment = comment_load($cid);
return
$comment->langcode;
?>
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done