Enable subscription form use localised messages

Author: webknjaz

_layouts/default.html

@@ -10,6 +10,7 @@
 
     <script src="{{ "/assets/js/index.js" | relative_url }}"></script>
     <script type="text/javascript" src="//s3.amazonaws.com/downloads.mailchimp.com/js/mc-validate.js"></script>
+    <script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.15.0/localization/messages_{{ site.locale | split: "-" | first }}.js"></script>
     <script type="text/javascript">(function($) {window.fnames = new Array(); window.ftypes = new Array();fnames[0]='EMAIL';ftypes[0]='email';fnames[1]='FNAME';ftypes[1]='text';fnames[2]='LNAME';ftypes[2]='text';}(jQuery));var $mcj = jQuery.noConflict(true);</script>
   </body>
 </html>