I’ve been using those for about 6 months now. She can definitely read numbers & words & can speak numbers & some words, make small sentences but she does a lot of what I call mumble talking. She’ll start off talking good & run out of words & start mumbling. It’s getting better. She does know some sign language too so she does add in that sometimes & can be hard to catch.
I’m sure the work you’ve done with them has helped immensely.