The “piano” means “soft” in Italian. The instrument’s name is actually short for “pianoforte” (soft-loud) which is short for “gravicembalo col piano e forte” (harpsichord with soft and loud). Calling it “piano” defeats the purpose of its original name that meant to depict its dynamic sound.
Italian is attractive to the ear because it benefits from a very high number of words that end in vowels, and few words with many consonants in a row, creating an open sound that makes it perfect for singing.
The Italian words widely used in New Jersey differ greatly from mainstream Italian today not because of bad “copying” but because the words came from people speaking an Italian dialect that subsequently died out in Italy.