Switch to the actual system locale at startup if we have translations for it....

Switch to the actual system locale at startup if we have translations for it. Otherwise fall back to the default 'en' locale.

pd/nw/pdlang.js

 "use strict";
 
-var lang = require('./locales/en/translation.json');
+var lang;
+
+try {
+    // try the locale given by navigator.language
+    lang = require('./locales/'+navigator.language+'/translation.json');
+} catch (e) {
+    // if that fails then fall back to the default locale 'en'
+    lang = require('./locales/en/translation.json');
+}
 
 exports.lang = lang;