[BUGFIX] en is always visible.

Classes/Service/ConfigurationService.php

@@ -684,7 +684,9 @@ class ConfigurationService extends AbstractService {
 			$sysLanguageService = $this->objectManager->get('SGalinski\Lfeditor\Service\SysLanguageService');
 			foreach ($languages as $index => $languageFlag) {
 				$sysLanguageId = $sysLanguageService->getSysLanguageIdByFlag($languageFlag);
-				if ($sysLanguageId !== NULL && $backendUser->checkLanguageAccess($sysLanguageId)) {
+				if ($languageFlag === 'en'
+					|| $sysLanguageId !== NULL && $backendUser->checkLanguageAccess($sysLanguageId)
+				) {
 					continue;
 				}
 				unset($languages[$index]);