diff --git a/core/config/schema/core.data_types.schema.yml b/core/config/schema/core.data_types.schema.yml
index 4ab0fd7..c6aca36 100644
--- a/core/config/schema/core.data_types.schema.yml
+++ b/core/config/schema/core.data_types.schema.yml
@@ -605,10 +605,10 @@ field.field_settings.boolean:
   type: mapping
   mapping:
     on_label:
-      type: string
+      type: label
       label: 'On label'
     off_label:
-      type: string
+      type: label
       label: 'Off label'
 
 field.value.boolean:
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index a718808..cb7e0d1 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\config_translation\Tests;
 
 use Drupal\Component\Serialization\Json;
+use Drupal\Component\Utility\Html;
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Language\Language;
@@ -734,6 +735,46 @@ public function testFieldConfigTranslation() {
   }
 
   /**
+   * Tests the translation of a boolean field settings.
+   */
+  public function testBooleanFieldConfigTranslation() {
+    // Add a test boolean field.
+    $field_name = strtolower($this->randomMachineName());
+    FieldStorageConfig::create([
+      'field_name' => $field_name,
+      'entity_type' => 'entity_test',
+      'type' => 'boolean',
+    ])->save();
+
+    $bundle = strtolower($this->randomMachineName());
+    entity_test_create_bundle($bundle);
+    $field = FieldConfig::create([
+      'field_name' => $field_name,
+      'entity_type' => 'entity_test',
+      'bundle' => $bundle,
+    ]);
+
+    $on_label = 'On label (with <em>HTML</em> & things)';
+    $field->setSetting('on_label', $on_label);
+    $off_label = 'Off label (with <em>HTML</em> & things)';
+    $field->setSetting('off_label', $off_label);
+    $field->save();
+
+    $this->drupalLogin($this->translatorUser);
+
+    $this->drupalGet("/entity_test/structure/$bundle/fields/entity_test.$bundle.$field_name/translate");
+    $this->clickLink('Add');
+
+    // Checks the text of details summary element that surrounds the translation
+    // options.
+    $this->assertText(Html::escape(strip_tags($on_label)) . ' Boolean settings');
+
+    // Checks that the correct on and off labels appear on the form.
+    $this->assertEscaped($on_label);
+    $this->assertEscaped($off_label);
+  }
+
+  /**
    * Test translation storage in locale storage.
    */
   public function testLocaleDBStorage() {