I know this is from a different version (4.1.9) but perhaps it maybe useful to you
the language variable is called txt_header_location_note and looks like ...
If the page is not updated in {{time}} seconds, please follow this link: <a href="{{location}}">continue >></a>
which is referred to in include/func/func.core.php on lines 126 and 333
and looks something like...
echo "<br /><br />".func_get_langvar_by_name("txt_header_location_n ote", array("time" =>
If this helps I have no ideas.