TTSOnInit.kt

override fun onInit(status: Int) {
      // check the results in status variable.
      if (status == TextToSpeech.SUCCESS) {
          // setting the language to the default phone language.
          val ttsLang = textToSpeech.setLanguage(Locale.getDefault())
          // check if the language is supportable.
          if (ttsLang == TextToSpeech.LANG_MISSING_DATA || ttsLang == TextToSpeech.LANG_NOT_SUPPORTED) {
              Toast.makeText(this, "We can't support your language", Toast.LENGTH_LONG).show()
          }
      } else {
          Toast.makeText(this, "TTS Initialization failed!", Toast.LENGTH_SHORT).show()
      }
}