The TalkJS search feature includes the ability to highlight certain words in messages. Call
this method to highlight certain words without having the user invoke the search feature.
Call again with an empty array to disable highlighting.
Enable/disable translation by default. This setting is applied to any conversation for which you haven't set a specific value.
@param enabled - Whether conversations should be translated by default or not. Pass "auto" to enable translation for conversations
with users with different locales.