Overwrite "Language" field for code-templates?

Hi again,

i currently want to add some code-templates to my plugin 
http://wcm.io/tooling/netbeans/sightly/ using this FAQ:
http://wiki.netbeans.org/DevFaqEditorHowToAddCodeTemplates

Works fine so far but I wonder, if there is an option to overwrite the 
value of the Language displayed in Options -> Editor -> Code Templates 
-> Language.

Currently my Templates are sorted into the HTML language but I'd love to 
see them in Sightly while keeping the mimeType html. I think this is 
related to my other issue already posted on this mailing list (I can't 
implement a new Language as Netbeans does not allow multiple Languages 
registered on the same MimeType.

My current layer:

<!DOCTYPE filesystem PUBLIC "-//NetBeans//DTD Filesystem 1.2//EN" 
"http://www.netbeans.org/dtds/filesystem-1_2.dtd">
<filesystem>
   <folder name="Editors">
     <folder name="text">
       <folder name="html">
         <folder name="CodeTemplates">
           <file name="io-wcm-tooling-netbeans-sightly-codetemplates.xml" 
url="code-templates.xml"/>
         </folder>
       </folder>
     </folder>
   </folder>
</filesystem>