When Sylvia Ganush attacks Christine in her car, Sylvia curses in Hungarian, "Az ördög szálljon beléd!" ("Shall the devil fly into you!") She also uses the Hungarian word "szajha" two times (the word means "bitch" or "whore" in English).
The movie begins with the 1980s Universal logo, which refers to when director Sam Raimi got started in the horror genre with the first two "Evil Dead" movies. After the credits, there is also the title card that says to take a tour of Universal Studios. This was also used in the 1980s in other Universal movies, such as An American Werewolf in London (1981).
In the movie, Shaun San Dena (Adriana Barraza) mentions her late husband Sander, a reference to both Sam Raimi's older sibling, Sander Raimi, who died in a swimming accident at age fifteen while on a trip to Israel, and his oldest nephew, Sander Rubin.
The Greek letters surrounding the walls of the Great Room (where they hold the séance) are taken from the Book of Revelation, Chapter 12. Translated they read: "And they conquered by the blood of the Lamb; wherefore rejoice heavens, woe to earth and sea; for the devil has come down to you having great wrath, knowing his time is short." San Dena paraphrases this passage in Spanish when she drives the demon from Milos. For instance, "Lo venceremos por la sangre del Cordero" means "We will defeat him by the blood of the Lamb".
When Sylvia Ganush attacks Christine in her car, Sylvia uses the Hungarian word "szajha" two times. The word means bitch or whore in English. She says it for the first time after her face has been stapled, the second time she says it right after she breaks Christine's car's window with a brick. When Christine first sees Sylvia in her car, Sylvia says in English: "You shamed me." Grabs Christine's hair, pulls her back and tells her this time in Hungarian: "Te szégyentelen", literal translation would be: "You shameless".
In the grave scene near the end its a different girl playing Cristines character. The camera cuts away from Alison, the original actor, then cuts back to a different girl as she climbs out of the grave.
Critics complained that this was a misogynistic backlash type warning to women not to be too ambitious; that women have to stay in the helper/servant type mode, and if they try to get competitive or flex a little corporate strength in the office, the way men do all the time, they will get sent to Hell.
The drag me to hell idea actually comes from a couple of different folklore stories:. The furies, or eurynes were figures of vegence in Greek mythology. When summoned by people who were wronged or victimized in some way they would wreak vengeance on the wrongdoer for a period of time until they killed themselves; and then torture and terrorize them in the Underworld. The drag me to hell idea also comes from the Krampus; a figure in Northwest European countries that accompanied Santa Claus in the Christmastime traditions. Where Santa would reward the good children with gifts, the Krampus would drag the wicked children right to hell, even before they died. Both of these helped inform the vengeful "Lamia" character in the movie.
Ted Raimi: Sam's brother makes an off-screen cameo as a doctor. Their brother Ivan (also the co-screenwriter of this and several other Sam Raimi-directed films) really is a practicing doctor of osteopathic medicine.
The trivia item below may give away important plot points.
As with Carrie (1976) there's a put upon outcast type heroine who is terrorized by villains for the bulk of the story, there's an antagonistic wicked stepmother type character who punishes the heroine, the heroine dies and then goes to hell at the ending. And the names of the protagonists are very similar. They're both "C" names with a color as the last name: Carrie White and Christine Brown.