only in patch2:
unchanged:
--- a/core/modules/language/src/Plugin/migrate/source/Language.php
+++ b/core/modules/language/src/Plugin/migrate/source/Language.php
@@ -10,7 +10,7 @@
 use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
 
 /**
- * @MigrateSource(
+ * @MigrateDrupalSource(
  *   id = "language",
  *   source_provider = "locale"
  * )