Pete, I think that Michael's conversion to english was to further dramatize the murder scene for the audience. It allowed Michael a point of departure after hearing Sollozzo claim to be the hunted one and desire only a truce. Thus, the audience is informed that Michael 's suspicions about Sollozzo's intent are confirmed.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
