CommentLazyBuilders should be language aware

+++ b/core/modules/comment/tests/src/Functional/CommentTranslationUITest.php
@@ -234,4 +235,49 @@ protected function doTestTranslationEdit() {
+      if (!$comment->hasTranslation($langcode)) {
+        $options = ['language' => \Drupal::languageManager()->getLanguage($default_langcode)];
+      }

I think we should also assert that $options['language'] doesn't equal the default langcode for all except $default_langcode and $not_translated_langcode

Re-roll the patch For 10.1