How to use character mapping in C# windows application and store SQL database

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_Enter(object sender, EventArgs e)
        {
            SetKeyboardLayout(GetInputLanguageByName("mal"));

        }

        private void textBox1_Leave(object sender, EventArgs e)
        {
            SetKeyboardLayout(GetInputLanguageByName("eng"));
        }

        public static InputLanguage GetInputLanguageByName(string inputName)
        {
            foreach (InputLanguage lang in InputLanguage.InstalledInputLanguages)
            {
                if (lang.Culture.EnglishName.ToLower().StartsWith(inputName))
                    return lang;
            }
            return null;
        }

        public void SetKeyboardLayout(InputLanguage layout)
        {
            InputLanguage.CurrentInputLanguage = layout;
        } 
    }
}