How to change speech recognition language

Question

(sry for my English)

Hi everybody, I'm currently using WinXP, visual 2k5 + SAPI 5.1

While developing program using Speech SDK, I wouldn't find out way to change the current speech recognition language although I can get the list of languages supported.

  //SpSharedRecoContext RC = new SpSharedRecoContext();
            foreach (ISpeechObjectToken t
                     in RC.Recognizer.GetRecognizers(string.Empty, string.Empty))
            {
                string a = t.GetDescription(0);
                if (a == "Microsoft Japanese Recognizer v5.1")
                {
                    //I want to put the code that change the current language recognition here
                }
                comboBox1.Items.Add(a);
            }
            

I've searched in the internet for the solving my problem but I couldn't get the answer. Anyone help me?
Thanks in advance .