diff -u b/core/modules/system/system.tokens.inc b/core/modules/system/system.tokens.inc
--- b/core/modules/system/system.tokens.inc
+++ b/core/modules/system/system.tokens.inc
@@ -115,7 +115,8 @@
         case 'slogan':
           $config = \Drupal::config('system.site');
           $bubbleable_metadata->addCacheableDependency($config);
-          $slogan = $config->get('slogan');
+          $build = ['#markup' => $config->get('slogan')];
+          $slogan = \Drupal::service('renderer')->renderPlain($build);
           $replacements[$original] = $slogan;
           break;
 
diff -u b/core/modules/taxonomy/taxonomy.tokens.inc b/core/modules/taxonomy/taxonomy.tokens.inc
--- b/core/modules/taxonomy/taxonomy.tokens.inc
+++ b/core/modules/taxonomy/taxonomy.tokens.inc
@@ -168,7 +168,8 @@
           break;
 
         case 'description':
-          $replacements[$original] = $vocabulary->getDescription();
+          $build = ['#markup' => $vocabulary->getDescription()];
+          $replacements[$original] = \Drupal::service('renderer')->renderPlain($build);
           break;
 
         case 'term-count':