The Russian word that appears at least twice (supposedly the manufacturer of a piece of electric equipment) is 'Covfefe' in Cyrillic letters.
Both Zachary Quinto and Sofia Boutella starred together in Star Trek: Beyond (2016).
The hotel is named for the Greek goddess, Artemis, who was the goddess of the hunt, known in Roman myth as Diana. She was the twin of Apollo, illegitimate daughter of Zeus, born in secret on a floating island to avoid the wrath of Hera. Her mother, Leto, is sometimes referred to as "the hidden one" due to her need to hide from Hera. In this film, the Nurse is sort of the mother of the Hotel Artemis and she too is "hidden."
Despite the fact that many of the characters' real names are revealed in the film, the end credits only list their code names. The Nurse, Waikiki, Niagara and so on.
There are four patient rooms in the Hotel Artemis: Niagara, Honolulu, Accapulco and Nice. Patients assigned to these rooms are only ever referred to by that room's name. Sterling K. Brown's character is called "Waikiki," because he shares the Honolulu room with his brother.
Kenneth Choi and Sterling K Brown both appeared in "The People vs OJ Simpson" (as Judge Lance Ito and Christopher Darden, respectively).