C# WebClient doesn't return UTF-8

Hey :) I'm trying really hard to make WebClient return me UTF-8. But when sub should return something like Ä it's more a E or so I think.

Gave a lot of workarounds a try, but It won't work.

private string translate(string input, string languagePair)
{
    string url = String.Format("https://translate.google.com/?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair);
    WebClient wc = new WebClient();
    wc.Headers.Add(HttpRequestHeader.AcceptCharset, "UTF-8");
    wc.Encoding = Encoding.UTF8;
    var data = wc.DownloadData(url);
    var result = Encoding.UTF8.GetString(data);
    //string result = wc.DownloadString(url);
    int start = result.IndexOf("result_box");
    string sub = result.Substring(start);
    sub = sub.Substring(0, sub.IndexOf("</span>"));
    start = sub.LastIndexOf(">");
    sub = sub.Substring(start + 1);
    return sub;
}