diff --git a/core/modules/language/migration_templates/default_language.yml b/core/modules/language/migration_templates/default_language.yml
index 7af3f9c..6d7604d 100644
--- a/core/modules/language/migration_templates/default_language.yml
+++ b/core/modules/language/migration_templates/default_language.yml
@@ -14,7 +14,8 @@ process:
       source: language_default
       default_value:
         'language': 'en'
-    # Let's encode and decode to get rid of the default language stdClass.
+    # Encode and decode to turn the default_language variable, which is
+    # an stdClass, into an array so it can be passed to extract.
     -
       plugin: callback
       callable:
diff --git a/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php b/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
index 14c2a7c..94bb02d 100644
--- a/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
+++ b/core/modules/language/tests/src/Kernel/Migrate/MigrateDefaultLanguageTrait.php
@@ -54,7 +54,7 @@ protected function doTestMigration($langcode, $existing = TRUE) {
   }
 
   /**
-   * Helper method to test the migration with unset variable.
+   * Helper method to test migrating the default language when no default language is set.
    */
   protected function doTestMigrationWithUnsetVariable() {
     // Delete the language_default variable.