I use English in between <!-- and -->.  Lots of it.
 
> Aside from attempts to win a future "Obfuscated XSL 
> Stylesheet Content," I need to find a "best (or decent) 
> practice" for documenting my stylesheets.  XPath queries, for 
> example, look like they'll be particularly difficult to 
> unravel in a month or two.


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list