মিডিয়াৱিকি আলোচনা:Common.js
mw.loader.load('//en.wikisource.org/w/index.php?title=MediaWiki:PageNumbers.js&action=raw&ctype=text/javascript'); edit this line with
mw.loader.load('//as.wikisource.org/w/index.php?title=MediaWiki:PageNumbers.js&action=raw&ctype=text/javascript');
your edited MediaWiki:PageNumbers.js is not working, ans shown English because still is fetching from English Wikisource. just change this en to as.