Which leads me to the problem I had with the site.
I was hoping for a way to easily (one click) get to the documentation for each of these. It seemed strange that a given name pattern could work for any human language, so I was trying to work out how this would be done. Eventually I found the tables at the bottom (with Advanced and Tricks tabs) but clicking on the links in there just adds the items to my current expression.. what I was hoping for was a direct link to some docs for the specific item (not a general link to the top level of some huge document).