My friend speaks both perfect English and Portuguese and here is a translation of the confrontation between Silva and Belfort at the weigh ins:
Silva: "You can't touch me, you're not man enough. I'll eat your asshole alive you bitch. Now anybody in here can't fuck with this, this is the ultimate."
Belfort: "Come at me, bro."
Silva: "Fuck you, you ho. Come and say it to my face and I'll fuck you in the ass in front of everybody you bitch."
Belfort: "Come at me, bro."
Silva: "Come on you bitch, you scared coward, you're not man enough to fuck with me. You can't last 2 minutes in my world, bitch. Look at you, scared now, you ho. Scared like a little white pussy, scared of the real man. I'll fuck you till you love me, faggot."
Belfort: "Come at me, bro."
I'm pretty sure Belfoot said "get your feet cleaned thoroughly, i don't want to eat fungi or dirt as a pre-bedtime snack on saturday, bro."