How to get data off of a character

Question

I am working on a project in Unity which uses Assembly C#. I try to get special character such as é, but in the console it just displays a blank character: "". For instance translating "How are you?" Should return "Cómo Estás?", but it returns "Cmo Ests". I put the return string "Cmo Ests" in a character array and realized that it is a non-null blank character. I am using Encoding.UTF8, and when I do:

char ch = '\u00e9';
print (ch);

It will print "é". I have tried getting the bytes off of a given string using:

byte[] utf8bytes = System.Text.Encoding.UTF8.GetBytes(temp);

While translating "How are you?", it will return a byte string, but for the special characters such as é, I get the series of bytes 239, 191, 189, which is a replacement character.

What type of information do I need to retrieve from the characters in order to accurately determining what character it is? Do I need to do something with the information that Google gives me, or is it something else? I am need a general case that I can place in my program and will work for any input string. If anyone can help, it would be greatly appreciated.

Here is the code that is referenced:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEngine;
using System.Collections;
using System.Net;
using HtmlAgilityPack;


public class Dictionary{
string[] formatParams;
HtmlDocument doc;
string returnString;
char[] letters;
public char[] charString;
public Dictionary(){
    formatParams = new string[2];
    doc = new HtmlDocument();
    returnString = "";
}

public string Translate(String input, String languagePair, Encoding encoding)
    {
        formatParams[0]= input;
        formatParams[1]= languagePair;
        string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", formatParams);

        string result = String.Empty;

        using (WebClient webClient = new WebClient())
        {
            webClient.Encoding = encoding;
            result = webClient.DownloadString(url);
        }       
        doc.LoadHtml(result);
        input = alter (input);
        string temp = doc.DocumentNode.SelectSingleNode("//span[@title='"+input+"']").InnerText;
        charString = temp.ToCharArray();
        return temp;
    }
// Use this for initialization
void Start () {

}
string alter(string inputString){
    returnString = "";
    letters = inputString.ToCharArray();
    for(int i=0; i<inputString.Length;i++){
        if(letters[i]=='\''){
            returnString = returnString + "&#39;";  
        }else{
            returnString = returnString + letters[i];   
        }
    }
    return returnString;
}
}

Answer 1

Maybe you should use another API/URL. This function below uses a different url that returns JSON data and seems to work better:

    public static string Translate(string input, string fromLanguage, string toLanguage)
    {
        using (WebClient webClient = new WebClient())
        {
            string url = string.Format("http://translate.google.com/translate_a/t?client=j&text={0}&sl={1}&tl={2}", Uri.EscapeUriString(input), fromLanguage, toLanguage);
            string result = webClient.DownloadString(url);

            // I used JavaScriptSerializer but another JSON parser would work
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            Dictionary<string, object> dic = (Dictionary<string, object>)serializer.DeserializeObject(result);
            Dictionary<string, object> sentences = (Dictionary<string, object>)((object[])dic["sentences"])[0];
            return (string)sentences["trans"];
        }
    }

If I run this in a Console App:

    Console.WriteLine(Translate("How are you?", "en", "es"));

It will display

¿Cómo estás?