How does the voice recognizer work?
An example demonstration might help.
Here are two examples
and the SpeechRecognizer documentation SpeechRecognizer
.Get text to Tamil [which code is used]?
My understanding is TextToSpeech and SpeechRecognizer cannot use App Inventor controls to use Tamil.
There are alternatives:
https://www.google.com/search?q=TextToSpeech+android+Tamil&rlz=1C1CHBF_enUS887US887&oq=TextToSpeech+android+Tamil&aqs=chrome..69i57.18934j0j9&sourceid=chrome&ie=UTF-8