diff -u b/token.tokens.inc b/token.tokens.inc
--- b/token.tokens.inc
+++ b/token.tokens.inc
@@ -128,7 +128,7 @@
   // Node tokens.
   $info['tokens']['node']['source'] = array(
     'name' => t('Translation source node'),
-    'description' => t("The source node for this current node's translation set."),
+    'description' => t("The source node for this current node's entity translation."),
     'type' => 'node',
   );
   $info['tokens']['node']['log'] = array(
@@ -610,8 +610,7 @@
 
     // Chained token relationships.
     if (($parent_tokens = \Drupal::token()->findWithPrefix($tokens, 'source')) && $source_vocabulary = \Drupal::service('entity.repository')->getTranslationFromContext($vocabulary, LanguageInterface::LANGCODE_DEFAULT)) {
-      $replacements += \Drupal::token()->generate('vocabulary', $parent_tokens, array(
-        'vocabulary' => $source_vocabulary),
+      $replacements += \Drupal::token()->generate('vocabulary', $parent_tokens,
         $options, $bubbleable_metadata);
     }
   }