Disqus doesn't detect the language!

I used this javascript code that i found on http://help.disqus.com/customer/portal/articles/466249-multi-lingual-websites and disqus doesn’t change of language, it’s always in english..

<script type="text/javascript">
var disqus_config = function () {
  this.language = "es_ES";
};
</script>

https://wordpress.org/plugins/disqus-comment-system/