[Zope] Could Someone Clean This DTML Up?

[beno]

Hi;
Here's my code. I know there are all sorts of errors. But I'm not sure 
where in the documentation to find the corrections (other than somewhere in 
the Zope Book). Your help would be appreciated.

<dtml-let lang="REQUEST.get('HTTP_ACCEPT_LANGUAGE')">
  <dtml-in expr="context.objectsInTheFolder">
   <dtml-if expr="&dtml-id==&dtml-lang">
    <dtml-let approved="&dtml-lang">
   <dtml-else>
    <dtml-let approved="en-us">
   </dtml-if>
  </dtml-in>
</dtml-let>

TIA,
beno