diff -up ./src/PHPMailer.php.rpm ./src/PHPMailer.php
--- ./src/PHPMailer.php.rpm	2018-03-27 14:01:40.736223588 +0200
+++ ./src/PHPMailer.php	2018-03-27 14:02:31.291471961 +0200
@@ -1994,7 +1994,7 @@ class PHPMailer
         ];
         if (empty($lang_path)) {
             // Calculate an absolute path so it can work if CWD is not here
-            $lang_path = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR;
+            $lang_path = __DIR__ . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR;
         }
         //Validate $langcode
         if (!preg_match('/^[a-z]{2}(?:_[a-zA-Z]{2})?$/', $langcode)) {