I think people who put God in everything have a hard time not doing it.
I most likely would not say anything, because it has to do with their religious beliefs and I am loathe to say anything that might seem like I have a problem with the way someone practices their religion. I’d just usually ignore it as their thing. If it was really getting to be too much and annoying I might not spend as much time with them.
Maybe I would say, “I’m not religious and I noticed you put God into everything.” See how they respond.
If they realize it might make me uncomfortable that’s good, and I would tell them I’m not accustomed to people wearing religion on their sleeve, it sometimes is uncomfortable.
If they say they want God to know they bear witness, then I know I can’t expect them to stop.
If they say they hope I can find my way to Jesus Christ, I know there is probably a problem, and I would tell them thank you for caring about me, but I’m not interested.