Retrieves a list of ISO languages that are set for the browser.
This variable might be useful for estimating which user locale to set for new or guest users.
Returns a list of languages as a comma-delimited string.
As information output on a page or to a log:
HTTP_ACCEPT_LANGUAGE=en-us,en;q=0.50
As part of an Idoc Script statement or evaluation:
<$if HTTP_ACCEPT_LANGUAGE$>
<!--statement-->