diff --git a/core/modules/config_translation/config_translation.api.php b/core/modules/config_translation/config_translation.api.php
index f631655..c20294d 100644
--- a/core/modules/config_translation/config_translation.api.php
+++ b/core/modules/config_translation/config_translation.api.php
@@ -53,7 +53,7 @@ function hook_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' => t('!label field'),
+          'title' => t('@label field'),
           'class' => '\Drupal\config_translation\ConfigFieldMapper',
           'base_entity_type' => $entity_type_id,
           'weight' => 10,
diff --git a/core/modules/config_translation/config_translation.module b/core/modules/config_translation/config_translation.module
index 3c81f78..7644f3e 100644
--- a/core/modules/config_translation/config_translation.module
+++ b/core/modules/config_translation/config_translation.module
@@ -115,7 +115,7 @@ function config_translation_config_translation_info(&$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' => $entity_type_id,
           'weight' => 10,
@@ -144,7 +144,7 @@ function config_translation_config_translation_info(&$info) {
     $info[$entity_type_id] = array(
       'class' => '\Drupal\config_translation\ConfigEntityMapper',
       'base_route_name' => $base_route_name,
-      'title' => '!label !entity_type',
+      'title' => '@label @entity_type',
       'names' => array(),
       '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..d454bb8 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..acb65c8 100644
--- a/core/modules/config_translation/src/FormElement/FormElementBase.php
+++ b/core/modules/config_translation/src/FormElement/FormElementBase.php
@@ -100,9 +100,9 @@ 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()),
-        '!source_language' => $source_language->getName(),
+      '#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,
     );
@@ -162,9 +162,9 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
   protected function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
     // Add basic properties that apply to all form elements.
     return array(
-      '#title' => $this->t('!label <span class="visually-hidden">(!source_language)</span>', array(
-        '!label' => $this->t($this->definition['label']),
-        '!source_language' => $translation_language->getName(),
+      '#title' => $this->t('@label <span class="visually-hidden">(@source_language)</span>', array(
+        '@label' => $this->t($this->definition['label']),
+        '@source_language' => $translation_language->getName(),
       )),
       '#default_value' => $translation_config,
       '#attributes' => array('lang' => $translation_language->getId()),
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
index eb5cf75..687da5b 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationOverviewTest.php
@@ -116,7 +116,7 @@ public function testMapperListPage() {
       $entity_type = \Drupal::entityManager()->getDefinition($test_entity->getEntityTypeId());
       $this->drupalGet($base_url . '/translate');
 
-      $title = t('!label !entity_type', array('!label' => $test_entity->label(), '!entity_type' => $entity_type->getLowercaseLabel()));
+      $title = t('@label @entity_type', array('@label' => $test_entity->label(), '@entity_type' => $entity_type->getLowercaseLabel()));
       $title = t('Translations for %label', array('%label' => $title));
       $this->assertRaw($title);
       $this->assertRaw('<th>' . t('Language') . '</th>');
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index e4a4e3f..a06f158 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -367,7 +367,7 @@ public function testContactConfigEntityTranslation() {
 
     // Test that delete links work and operations perform properly.
     foreach ($this->langcodes as $langcode) {
-      $replacements = array('%label' => t('!label !entity_type', array('!label' => $label, '!entity_type' => Unicode::strtolower(t('Contact form')))), '@language' => \Drupal::languageManager()->getLanguage($langcode)->getName());
+      $replacements = array('%label' => t('@label @entity_type', array('@label' => $label, '@entity_type' => Unicode::strtolower(t('Contact form')))), '@language' => \Drupal::languageManager()->getLanguage($langcode)->getName());
 
       $this->drupalGet("$translation_base_url/$langcode/delete");
       $this->assertRaw(t('Are you sure you want to delete the @language translation of %label?', $replacements));
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
index 8041931..efbe68d 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigEntityMapperTest.php
@@ -70,7 +70,7 @@ protected function setUp() {
     $definition = array(
       'class' => '\Drupal\config_translation\ConfigEntityMapper',
       'base_route_name' => 'entity.configurable_language.edit_form',
-      'title' => '!label language',
+      'title' => '@label language',
       'names' => array(),
       'entity_type' => 'configurable_language',
       'route_name' => 'config_translation.item.overview.entity.configurable_language.edit_form',
diff --git a/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php b/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
index 740b722..3a78357 100644
--- a/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
+++ b/core/modules/config_translation/tests/src/Unit/ConfigFieldMapperTest.php
@@ -50,7 +50,7 @@ protected function setUp() {
     $definition = array(
       'class' => '\Drupal\config_translation\ConfigFieldMapper',
       'base_route_name' => 'entity.field_config.node_field_edit_form',
-      'title' => '!label field',
+      'title' => '@label field',
       'names' => array(),
       'entity_type' => 'field_config',
     );