diff --git a/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php b/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
index 87fbfbd..2cf5a6c 100644
--- a/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
+++ b/core/modules/language/src/Form/NegotiationBrowserDeleteForm.php
@@ -65,7 +65,14 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     if (array_key_exists($this->browserLangcode, $mappings)) {
       unset($mappings[$this->browserLangcode]);
       language_set_browser_drupal_langcode_mappings($mappings);
-      drupal_set_message(t('The configuration options have been saved.'));
+
+      $t_args = array(
+        '%browser' => $this->browserLangcode,
+      );
+
+      $this->logger('language')->notice('The browser language detection mapping for the %browser browser language code has been deleted.', $t_args);
+
+      drupal_set_message(t('The mapping for the %browser browser language code has been deleted.', $t_args));
     }
 
     $form_state->setRedirect('language.negotiation_browser');
diff --git a/core/modules/language/src/Tests/LanguageBrowserDetectionUnitTest.php b/core/modules/language/src/Tests/LanguageBrowserDetectionUnitTest.php
index 62ee8e3..5717da8 100644
--- a/core/modules/language/src/Tests/LanguageBrowserDetectionUnitTest.php
+++ b/core/modules/language/src/Tests/LanguageBrowserDetectionUnitTest.php
@@ -186,6 +186,12 @@ function testUIBrowserLanguageMappings() {
     $edit = array();
     $this->drupalPostForm('admin/config/regional/language/detection/browser/delete/' . $browser_langcode, $edit, t('Confirm'));
 
+    // We need raw here because %browser will add HTML.
+    $t_args = array(
+      '%browser' => $this->browserLangcode,
+    );
+    $this->assertRaw(t('The mapping for the %browser browser language code has been deleted.', $t_args), 'The test browser language code has been deleted.');
+
     // Check that ch-zn no longer exists.
     $this->assertNoField('edit-mappings-zh-cn-browser-langcode', 'Chinese browser language code no longer exists.');