in one of the Fonts that I work The Menu of languages in this way:
languagesystem DFLT dflt;
languagesystem arab dflt;
languagesystem latn dolt;
languagesystem latn ENG;
languagesystem arab URD;
But the urdu language is not working on Windows system only after deleting the last line of the list of languages!
To become explained below:
languagesystem DFLT dflt;
languagesystem arab dflt;
languagesystem latn dflt;
languagesystem latn ENG;