var Url = "https://translate.google.com/?hl=en&sl=auto&tl=hi&op=translate";

var currentUrl = window.location.href;
var langs=['bn','ta','te','mr','ur','pa','kn','gu'];
var parsedUrl = new URL(currentUrl);

for(i=0;i<langs.length;i++){
    parsedUrl.searchParams.set('tl', langs[i]);
    var new_url = parsedUrl.toString();
    window.open(new_url, '_blank');
}