Here is what I have changed for the german version:
Replace the "Action" with the correct words, depending on the OS Language.


 Code:
  if instr(@producttype,"Windows 7") and ($action="" or $action="Taskbar")
;    $action="Pin to Taskbar"
    $action="An Taskleiste anheften"
    $location="\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\" + $shortcut
	else
;    $action="Pin to Start Menu"
    $action="An Startmenü anheften"
    $location="\Microsoft\Internet Explorer\Quick Launch\User Pinned\StartMenu\" + $shortcut
  endif


Maybe, it's possible to check the OS language and replace the action with language depended content, before running this part of the function.