Samsung S5 speaks locations and "Welcome Home" - How to turn off?

This is for a friend's phone and I have not heard this myself.

He says the phone will randomly speak to him with messages like "welcome home" and it will also say where he is going when he leaves home.

I wish I could be more specific, but I don't have first hand experience with this.

Is this a driving mode thing? A talk back thing? A Samsung Voice thing? A Google Voice thing?

Thanks for any help.