How about localization support?
The following code shows how to use localization attributes in order to change the default captions and texts.

<html>
    <head>
        <link rel="stylesheet" href="../bins/lib/bootstrap/css/bootstrap.min.css"/>
        <script type="text/javascript" src="../bins/lib/angular/angular.min.js"></script>
        <script type="text/javascript" src="../bins/wl-ng-network-speed-tester.js"></script>
    </head>
    <body>
        <div ng-app="wl-ng-network-speed-tester" wl-ng-network-speed-tester
            locale-seconds="sec"
            locale-you="Your speed"
            locale-ping="Ping time"
            locale-download="Download speed"
            locale-upload="Upload speed"
            locale-cost="Estimative internet cost"
            locale-currency="Euro"></div>
        <script type="text/javascript">
            //must set the bins url
            angular.module('wl-ng-network-speed-tester').value('bins', '../bins');
        </script>
    </body>
</html>

After browsing to http;//the-server-root/javascript-network-speed-tester/sample/index.html, now we should get something like:

The directive with some localization

Please note how the corresponding text were changed. For more information regarding localization attributes, please check the Directive Attributes chapter, section Localization.