My wife is an intermediary ESL speaker (she didn't take any standardized test, I guess her level is ~B1-B2). She is now interacting with our ~one-year old baby ~90% in mother tongue and ~10% in English.
I am now exploring ways to increase the portion of English use. I am wondering if anyone can recommend some books to teach adults(i.e., my wife) to communicate with kids in English. The book should be about practical language use, not parenting theories. For example, the book should explain (to ESL parents) how to say "we need to change your diaper" / "let's take a nap now" / "Be quiet on a bus"/etc.
Any recommendations?