diff --git a/core/lib/Drupal/Core/Menu/menu.api.php b/core/lib/Drupal/Core/Menu/menu.api.php
index 2a77914..3569b24 100644
--- a/core/lib/Drupal/Core/Menu/menu.api.php
+++ b/core/lib/Drupal/Core/Menu/menu.api.php
@@ -388,7 +388,7 @@ function hook_contextual_links_alter(array &$links, $group, array $route_paramet
     // Dynamically use the menu name for the title of the menu_edit contextual
     // link.
     $menu = \Drupal::entityManager()->getStorage('menu')->load($route_parameters['menu']);
-    $links['menu_edit']['title'] = t('Edit menu: !label', array('!label' => $menu->label()));
+    $links['menu_edit']['title'] = t('Edit menu: @label', array('@label' => $menu->label()));
   }
 }
 
diff --git a/core/modules/aggregator/src/FeedViewBuilder.php b/core/modules/aggregator/src/FeedViewBuilder.php
index 50462af..d631790 100644
--- a/core/modules/aggregator/src/FeedViewBuilder.php
+++ b/core/modules/aggregator/src/FeedViewBuilder.php
@@ -114,7 +114,7 @@ public function buildComponents(array &$build, array $entities, array $displays,
         $build[$id]['feed_icon'] = array(
           '#theme' => 'feed_icon',
           '#url' => $entity->getUrl(),
-          '#title' => t('!title feed', array('!title' => $entity->label())),
+          '#title' => t('@title feed', array('@title' => $entity->label())),
         );
       }
 
diff --git a/core/modules/config_translation/config_translation.module b/core/modules/config_translation/config_translation.module
index 3c81f78..44bbc95 100644
--- a/core/modules/config_translation/config_translation.module
+++ b/core/modules/config_translation/config_translation.module
@@ -115,7 +115,7 @@ function config_translation_config_translation_info(&$info) {
         $info[$entity_type_id . '_fields'] = array(
           'base_route_name' => "entity.field_config.{$entity_type_id}_field_edit_form",
           'entity_type' => 'field_config',
-          'title' => '!label field',
+          'title' => '@label field',
           'class' => '\Drupal\config_translation\ConfigFieldMapper',
           'base_entity_type' => $entity_type_id,
           'weight' => 10,
diff --git a/core/modules/config_translation/src/ConfigEntityMapper.php b/core/modules/config_translation/src/ConfigEntityMapper.php
index 4a6d275..4342a79 100644
--- a/core/modules/config_translation/src/ConfigEntityMapper.php
+++ b/core/modules/config_translation/src/ConfigEntityMapper.php
@@ -158,7 +158,7 @@ public function getTitle() {
     // current page language. The title placeholder is later escaped for
     // display.
     $entity_type_info = $this->entityManager->getDefinition($this->entityType);
-    return $this->t($this->pluginDefinition['title'], array('!label' => $this->entity->label(), '!entity_type' => $entity_type_info->getLowercaseLabel()));
+    return $this->t($this->pluginDefinition['title'], array('@label' => $this->entity->label(), '!entity_type' => $entity_type_info->getLowercaseLabel()));
   }
 
   /**
diff --git a/core/modules/config_translation/src/FormElement/FormElementBase.php b/core/modules/config_translation/src/FormElement/FormElementBase.php
index 7db01e1..de6b714 100644
--- a/core/modules/config_translation/src/FormElement/FormElementBase.php
+++ b/core/modules/config_translation/src/FormElement/FormElementBase.php
@@ -100,8 +100,8 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
 
     return array(
       '#type' => 'item',
-      '#title' => $this->t('!label <span class="visually-hidden">(!source_language)</span>', array(
-        '!label' => $this->t($this->definition->getLabel()),
+      '#title' => $this->t('@label <span class="visually-hidden">(!source_language)</span>', array(
+        '@label' => $this->t($this->definition->getLabel()),
         '!source_language' => $source_language->getName(),
       )),
       '#markup' => $value,