He may not, maybe he’s talking about the sound when the car isn’t fast enough to alert people on the street, just to let know that something is coming. It shut at a certain speed I think

I’m not sure I understand what you mean… What switch color ?

You should use the Fdroid version if you are not confident about what you are doing (in my honest opinion) To add some dictionaries go to the website then download one dictionary :

Then click on the + button to add the dictionary you download :

Then select the one you downloaded and you should be good :)

Have a nice day !