Update to Drupal 8.0.6. For more information, see https://www.drupal.org/drupal-8.0.6-release-notes

core/modules/language/src/ConfigurableLanguageManager.php

@@ -472,7 +472,7 @@ class ConfigurableLanguageManager extends LanguageManager implements Configurabl
       }
       $predefined[$key] = new TranslatableMarkup($value[0]);
     }
-    asort($predefined);
+    natcasesort($predefined);
     return $predefined;
   }