为什么谷歌tts印地语（代码）不起作用？

Question

此代码对英语运行良好。但是，不要为印地语工作。请你帮助我好吗？感谢..

private void speach_text() {

                if (textview2.toString().equals("1")) {
                    loc1 = "en";
                    loc2 = "en_EN";
                }

                if (textview2.toString().equals("2")) {
                    loc1 = "hi";
                    loc2 = "hi_IN";
                }                

        final Locale locale = new Locale(lo1, lo2);

        tts = new TextToSpeech(Mainactivity.this, new TextToSpeech.OnInitListener() {

            @Override
            public void onInit(int status) {
                if (status == TextToSpeech.SUCCESS) {
                    int result = tts.setLanguage(locale);
                    tts.speak(textview1.getText().toString(),TextToSpeech.QUEUE_FLUSH, null);
                } else {               
                }
            }
        });
    }