show different popup on 3 languages website

ello, thank you very much for your plug in.
I have a site with three languages,
Italian (/), English (/en) and German (/de).
I’ve created three newsletter popups, one per language but i cant show only the pop up of the language of interest.

If I insert these two js codes in the popup in Italian in the other languages I do not see the popup in Italian, and it is correct.

var url = window.location.href;
if (url.indexOf(‘/en’) > 0) {return false;}
var url = window.location.href;
if (url.indexOf(‘/de’) > 0) {return false;}

but in other languages doesn’t work, probably because the Italian is in the root and using this code below make some problems (?)

var url = window.location.href;
if (url.indexOf(‘/’) > 0) {return false;}

how can I do?

Many thanks to all