My uncle went to Canada in the 1970s and his sons cant speak italian.
I think that was a fase in the american mafia from the beginning to 1960s which all the boss was born in italy and can speak the old leanguage but after that with bosses born in the US the things changed.
The first american born boss was Joe Colombo and for the others:Gotti cant point the italy on a map and for the soldiers some of them mocked the old mangiaspaghetti and this is a motive why the familis had/have a zip faction.
And after all the important thing is to made money not declaim poems.

Ence ne costa lacreme st'America
a nuje Napulitane.
Pe' nuje ca ce chiagnimmo 'o cielo 'e Napule,
comm'è amaro stu ppane.