using System;

using System.Linq;

using Newtonsoft.Json.Linq;

using System.Net;

​

public class Program

{

    public static void Main()

    {

        string content;

        using (var webClient = new WebClient())

        {

            const string url = "http://en.wikipedia.org/w/api.php?format=json&action=query&titles=Cloud&prop=langlinks&lllimit=500&lllang=ru&continue=";

            content = webClient.DownloadString(url);

        }

​

        var obj = JObject.Parse(content);

        var query = obj["query"];

        var pages = query["pages"].Value<JObject>();

        var page = pages.PropertyValues().First();

        var langLinks = page["langlinks"].Values<JObject>();

        var firstLangLink = langLinks.First();

        var localizedName = firstLangLink["*"];

        Console.WriteLine(localizedName);

    }

}