Despite all the references through the move none of the leads are Mexican or Mexican related. Camilla Belle was born in the USA to a Brazilian father and USA mother. Alexa PenaVega was also born in the USA to a Colombian father and a USA mother.
Mary states the the 'birds of paradise' flower is the state flower of California during the Independence Day party. This is incorrect, however the 'birds of paradise' is the official flower of the city of Los Angeles, where the movie takes place.
When Mary received an e-mail from Rodrigo, the e-mail address of Mary was "mdominez@mail.web". But when she received the next email, it became "mdomingez@mail.web".
In the scene where Mary has entered the house of Bruno and stands in front of the painting that he made, she hears Bruno's voice and gets closer to the open doors to look what's going on, one can clearly see that the cast around her neck is missing, yet when she rolls out towards the garden, she's wearing the cast again.
The cast on Mary's leg switches from one leg to the other, from when she is wheeled into the house and when she and Nora are in their bedroom then back to the original leg. The reason why the cast on Mary's leg appears to switch from one leg to another is because the initial camera angle in the bedroom is pointed at the mirror (frame around the image), thus causing the cast to appear to be on Mary's left leg. On the next camera angle, it is pointed directly at Mary so it shows the cast to be on the right leg.