messages.speechToTextButtonString(default: "Toggle speech to text")
The title and aria-label for the speech-to-text button.
Example
<div id="chat"></div>
<script>
$("#chat").kendoChat({
    messages: {
        speechToTextButton: "Start voice input"
    },
    authorId: "user",
    speechToText: true
});
</script>
In this article