Mick Jones of The Clash sings the Clash song "Should I Stay Or Should I Go" in the karaoke-esque club scene, but he appears to get the words wrong. The song goes "If I go there will be trouble. If I STAY it will be double", but he sings "If I go there will be trouble. If I GO it will be double".
In this "unified" world, you hear several languages mixed into English. "Papeles" is Spanish for "papers". "Claro" is Spanish for "Clear", "Sure, Okay". Other languages mixed in are French and Chinese.