diff --git a/lib/Drupal/config_translation/Access/ConfigNameCheck.php b/lib/Drupal/config_translation/Access/ConfigNameCheck.php
index 0ac08a9..b2d5138 100644
--- a/lib/Drupal/config_translation/Access/ConfigNameCheck.php
+++ b/lib/Drupal/config_translation/Access/ConfigNameCheck.php
@@ -31,7 +31,7 @@ class ConfigNameCheck implements AccessCheckInterface {
     $entity = $request->attributes->get($mapper->getType());
     // Get configuration group for this mapper.
     $group = $mapper->getConfigGroup($entity);
-    $group_language = language_load($group->getLangcode());
+    $group_language = $group->getLanguageWithFallback();
 
     $langcode = $request->attributes->get('langcode');
     $language = empty($langcode) ? NULL : language_load($langcode);
@@ -39,8 +39,9 @@ class ConfigNameCheck implements AccessCheckInterface {
     // Only allow access to translate configuration, if proper permissions are
     // granted, the configuration has translatable pieces, the source language
     // and target language are not locked, and the target language is not the
-    // original submission language. Although technically config can be overlayed
-    // with translations in the same language, that is logically not a good idea.
+    // original submission language. Although technically config can be
+    // overlayed with translations in the same language, that is logically not
+    // a good idea.
     return (
       user_access('translate configuration') &&
         $group->hasSchema() &&
diff --git a/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php b/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
index 7e60fa3..8c36869 100644
--- a/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
+++ b/lib/Drupal/config_translation/Tests/ConfigTranslationUITest.php
@@ -382,6 +382,31 @@ class ConfigTranslationUITest extends WebTestBase {
   }
 
   /**
+   * Test case for single language existing.
+   */
+  function testSingleLanguageUI() {
+    // Delete French language
+    $this->drupalPost('admin/config/regional/language/delete/fr', array(), t('Delete'));
+    $this->assertRaw(t('The %language (%langcode) language has been removed.', array('%language' => 'French', '%langcode' => 'fr')));
+
+    // Change default language to Tamil.
+    $edit = array(
+      'site_default_language' => 'ta',
+    );
+    $this->drupalPost('admin/config/regional/settings', $edit, t('Save configuration'));
+    $this->assertRaw(t('The configuration options have been saved.'));
+
+    // Delete English language
+    $this->drupalPost('admin/config/regional/language/delete/en', array(), t('Delete'));
+    $this->assertRaw(t('The %language (%langcode) language has been removed.', array('%language' => 'English', '%langcode' => 'en')));
+
+    // Visit account setting translation page, this should not
+    // throw any notices.
+    $this->drupalGet('admin/config/people/accounts/translate');
+    $this->assertResponse(200);
+  }
+
+  /**
    * Gets translation from locale storage.
    *
    * @param $config_name