Speech to text one language to another language in ASP.NET C#

using System;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Speech.Recognition;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;
using System.Globalization;
using System.Speech.Synthesis;

namespace WindowsFormSpeechtotext
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

               private void Form1_Load(object sender, EventArgs e)
        {            
            SpeechRecognitionEngine speechRecognition =
                new SpeechRecognitionEngine
                    (new System.Globalization.CultureInfo("en-US"));          

           speechRecognition.SetInputToDefaultAudioDevice();          

          Grammar grammar = new DictationGrammar();
                     speechRecognition.LoadGrammar(grammar);

            speechRecognition.SpeechRecognized +=
                new EventHandler<SpeechRecognizedEventArgs> 
                (SpeechRecognition_SpeechRecognized);
            //
            speechRecognition.RecognizeAsync(RecognizeMode.Multiple);     
        }
        
        private void SpeechRecognition_SpeechRecognized
                (object sender, SpeechRecognizedEventArgs e)
        {
            richTextBox1.Text += e.Result.Text + "\r\n";
        }