Originally Posted by monkfish
I set DEFAULT_SERVER_LANGUAGE = 'en' and the script ran producing the above files which will resolve the errors seen.
That is correct.
Keep in mind that you CANNOT add the 'en' BEFORE installing ISPConfig as ISPConfig overwrites the file with a new one of it's own when you install ISPConfig. Threfore, that answer cannot prevent the error that displays on the screen during the ISPConfig install.