Other mistake: In the fight scene outside Trish's apartment, Jet Li kicks Maurice so he gets a scar on the right side on his lip. Later in the American football sequence you can at one shot see that he has the scar on his left side of the lip and in another shot it's completely gone.
Other mistake: In the scene where Colin and his girlfriend get thrown out of their apartment windows, the camera follows them down during their fallings until they splash into the water. Look closely at the skin of the girl and it is actually much "whiter" than it was before (the stuntwoman that took her place was white, not black). (00:55:20)
Other mistake: At the very end, when Han's father kills himself, Han is allowed to calmly walk out, reunite with Trish, and then both just calmly walk out of the scene without a single police officer stopping them for questioning. There is no way the police could've known at that very moment if Han didn't kill his father, or what exactly took place. Nobody interacts with him, as if everything is perfectly clear to the police.
Answer: Mac says 'Asalamu alaikum Akhbar' This is the Islamic greeting and means 'Peace be with you'. Akhbar is a Muslim Name so Mac would have said this to him.