diff --git a/src/PhpWord/Style/Language.php b/src/PhpWord/Style/Language.php
index d7a76f78..8a3b0315 100644
--- a/src/PhpWord/Style/Language.php
+++ b/src/PhpWord/Style/Language.php
@@ -64,6 +64,9 @@ final class Language extends AbstractStyle
 
     const PT_BR = 'pt-BR';
     const PT_BR_ID = 1046;
+    
+    const NL_NL = 'nl-NL';
+    const NL_NL_ID = 1043;
 
     /**
      * Language ID, used for RTF document generation