Detect language based on URL

If the outer website is english/danish, the chatapp will use the same
language.

img/chatapp.svg

@@ -68,7 +68,14 @@ const typing_speed = 50;
 
 var conversation_count = 0;
 var current_dialog = null;
+
 var current_language = "da";
+if(location.protocol.startsWith('http')) { // avoid X-origin errors
+  if(parent.location.href.match(/\ben\b/)) {
+    current_language = 'en';
+  }
+} // else: Just stick to danish
+
 var current_dialog_fn = null;
 
 /// SVG 1.1 doesn't do proper text splitting into several lines.