Get friendly URL with language flag? : EPiServer

My variable langURL currently returns a non-friendly URL like so: http://localhost:57299/link/457fee1669e348febf67ecb57b281945.aspx?epslanguage=de-AT

Is it possible to get a friendly URL?

public static IHtmlString HrefLangLinks(this PageData currentPage)
{
    var availablePageLanguages = currentPage.ExistingLanguages.Select(culture => culture.Name).ToArray();
    var Output = "";
    var langURL = "";
    foreach (string listitem in availablePageLanguages)
    {
        langURL = EPiServer.Web.UriUtil.AddLanguageSelection(currentPage.LinkURL, listitem);
        Output += "<link href=\"" + langURL + "\" hreflang=\"" + listitem + "\" rel=\"alternate\">";
    }
    // Dictionary<String, String>
    return new HtmlString(Output.ToString());
}

For each page I would like to get the friendly urls with the language flag as well, for example:

• /
• /de-DE
• /en-DE