// fix warning

classes/Language.php

@@ -460,7 +460,8 @@ class LanguageCore extends ObjectModel
 				}
 			closedir($handle);
 		}
-		rmdir($dir);
+		if (is_writable($dir))
+			rmdir($dir);
 	}
 
 	public function delete()

controllers/admin/AdminTranslationsController.php

@@ -460,7 +460,9 @@ class AdminTranslationsControllerCore extends AdminController
 		if (!$default_language || !Validate::isLanguageIsoCode($default_language))
 			return false;
 		// 1 - Scan mails files
-		$mails = scandir(_PS_MAIL_DIR_.$default_language.'/');
+		$mails = array();
+		if (Tools::file_exists_cache(_PS_MAIL_DIR_.$default_language.'/'))
+			$mails = scandir(_PS_MAIL_DIR_.$default_language.'/');
 
 		$mails_new_lang = array();