Language / Devoicing of Polish consonants not always correct? [11]

Hi so i was speaking Polish to my grandmother the other day and i said the word "Mów" but i pronounced it how everyone online tells you to like "MUF", long story short, she told me to pronounce that as "MUW"...

Do people in different areas of Poland not devoice consonants. All of my family is from a tiny town next to Rzeszów, and I've noticed we pronounce things differently like we always pronounce "Ę" nasalized, ugh i hate it when people don't nasalize it lol, and we pronounce things how they're written more, same thing for "Ą"...

Does anyone know anything about this, thanks!

Law / Confirmation of Polish citizenship of my mother (born in Poland) [9]

My case is very straight forward my mother was born in Poland, 1979, and we obviously have all her records(She might have a valid passport). most of my family is still in Poland and we keep in contact so i have an address for someone who lives in Poland, my grandmother can translate the legal stuff since I can't understand that complex Polish, and I have the New York consulate nearby. Do you think we could do it ourselves? How hard will this be? Also I'm 15 idk if that maters...

Language / Polish dative case: Why do you use "mu" in this sentence instead of "go" [9]

Powiedz mu żeby tak nie mówi or Powiedz mu że nie może tak mówić, for some reason I feel like it should be go, but my grandmother and google says otherwise