Printing indeed played a key role in standardizing and stabilizing these languages by fixing them in print, and producing dictionaries and grammar books.
This is where teachers of English might helpfully note the difference between denotation (dictionary meaning) and connotation (associations that may not be part of a formal definition).
My parents are actually, they grew up speaking the Navajo language; they're fluent speakers. They're like a dictionary. If I ask them, “How do you say this? ” they translate.
There was an elderly woman, who might be the housekeeper, mending clothes, and two young ladies, who seemed to be learning a language with dictionaries.