Added a comment to clearify *why* this works

src/static/js/pad_editor.js

@@ -79,6 +79,9 @@ var padeditor = (function()
       html10n.bind('localized', function() {
         $("#languagemenu").val(html10n.getLanguage());
         // translate the value of 'unnamed' and 'Enter your name' textboxes in the userlist
+        // this does not interfere with html10n's normal value-setting because html10n just ingores <input>s
+        // also, a value which has been set by the user will be not overwritten since a user-edited <input>
+        // does *not* have the editempty-class
         $('input[data-l10n-id]').each(function(key, input)
           {
             input = $(input);