diff --git a/lib/Drupal/config_translation/ConfigGroupMapper.php b/lib/Drupal/config_translation/ConfigGroupMapper.php
index c7d89f0..d5fea4a 100644
--- a/lib/Drupal/config_translation/ConfigGroupMapper.php
+++ b/lib/Drupal/config_translation/ConfigGroupMapper.php
@@ -149,6 +149,25 @@ class ConfigGroupMapper implements ConfigMapperInterface {
   }
 
   /**
+   * Returns language object for the configuration group.
+   *
+   * If the language of the group is not a configured language on the site and
+   * it is English, we return a dummy language object to represent the
+   * built-in language.
+   *
+   * @return \Drupal\Core\Language\Language
+   *   A configured language object instance or a dummy English language object.
+   *
+   */
+  public function getLanguageWithFallback() {
+    $langcode = $this->getLangcode();
+    if (!$language = language_load(langcode) && $langcode == "en") {
+      $language = new Language(array('langcode' => 'en', 'name' => t('Built-in English')));
+    }
+    return $language;
+  }
+
+  /**
    * Returns an array with configuration data for the group.
    *
    * @return array