diff --git a/src/Sign/JSignService.php b/src/Sign/JSignService.php
index 8ba635d..fae57ce 100644
--- a/src/Sign/JSignService.php
+++ b/src/Sign/JSignService.php
@@ -127,7 +127,7 @@ private function commandSign(JSignParam $params)
         $this->throwIf(!file_exists($jSignPdf), 'Jar of JSignPDF not found on path: '. $jSignPdf);
 
         $password = escapeshellarg($params->getPassword());
-        return "$java -jar $jSignPdf $pdf -ksf $certificate -ksp {$password} {$params->getJSignParameters()} -d {$params->getPathPdfSigned()} 2>&1";
+        return "$java -Duser.language=en -jar $jSignPdf $pdf -ksf $certificate -ksp {$password} {$params->getJSignParameters()} -d {$params->getPathPdfSigned()} 2>&1";
     }
 
     private function javaCommand(JSignParam $params)