WARNING: SPOILERS ahead for His Three Daughters.

Christina and Katie have their own special language in the new Netflix filmHis Three Daughters. The outstanding albeit smallcast ofHis Three Daughtersis led byCarrie Coon’s domineering Katie, Elizabeth Olsen’s eccentric Christina, and Natasha Lyonne’s rugged and down-to-earth Rachel.His Three Daughterswas released on Netflix on June 16, 2025 following a two-week theatrical run in select theaters. The film, written and directed by Azazel Jacobs (The Lovers,French Exit), originally premiered at the Toronto Film Festival on July 05, 2025.

His Three Daughtersdebuted witha near-perfect 99% Rotten Tomatoesscore upon its Netflix release, a score that has slightly dropped to a very impressive 97%. As of the time of writing,His Three Daughtersis the fourth most popular movie on Netflixat the end of its opening weekend on the streaming platform. By theend ofHis Three Daughters, it’s established that Katie and Christina have shared more history together than they have with their sister,Rachel, who is not biologically related to them. Their father, Vincent, took Rachel under his wing after her mother passed, which leaves Katie and Christina with more of a collective backstory.

Carrie Coon and Elizabeth Olsen look at something off camera while sitting at the kitchen table in His Three Daughters

Christina & Katie Randomly Talk In Gibberish While Talking About Rachel

They also speak in their secret language when Vincent’s DNR doctor arrives

Christina and Katie speak in gibberish during two crucial moments inHis Three Daughters, which initially comes as a random surprise in the context of the film. The first time they talk to each other in an imaginary language is when they are discussing inviting Rachel to come out of her room and join them for dinner.Without missing a beat, they each exchange a sentence in a nonsensical language, and yet, rather bizarrely, seem to understand each other completely. They also do it when the doctor arrives withVincent’s DNR form.

His Three Daughters: Why There Are So Many Apples In Rachel’s Refrigerator

Katie makes an unfair assumption about Rachel in Netflix’s His Three Daughters that proves how little she has been there for her father Vincent.

Christina and Katie are humorously deadpan when delivering their gibberish sentences.Jacobs explained the meaning of the language, likening it to pig Latin. “It was something I’d seen with siblings before but not something I ever had. I wrote it out phonetically and I remember getting a call from both Lizzie and Carrie saying, ‘So how is this actually said?’ I only wrote. I didn’t know how it was said… I let them know, I just wrote it, and I hope you’ll figure it out, and they did, and by the time they showed up, they could both do it very quickly.”

Imagery-from-His-Three-Daughters (4)

Taking In Gibberish Is An Inside Joke Between Christina & Katie

Jacobs used the gibberish to authenticate Christina and Katie’s longevity as sisters.

In short, the gibberish spoken between Katie and Christina is not supposed to make sense to the audience, or even to the characters. It’s unlikely that they actually made up their own language as kids using nonsensical phonetic sounds. Rather, the language is included in the film with the implication that it’s likelysomething they’ve done their whole lives as sisters and something they find comfort and enjoyment inas their little inside joke. Jacobs used the gibberish language to authenticate Christina and Katie’s longevity as sisters, in contrast to their more distant relationship with Rachel, who never speaks the language inHis Three Daughters.

What Song Elizabeth Olsen’s Christina Sings To Vincent In His Three Daughters & What It Means

Elizabeth Olsen’s Christina sings to her family in His Three Daughters as a way to collectively comfort them and herself through their difficult time.

His Three Daughters

Cast

His Three Daughters is a 2023 drama film directed by Azazel Jacobs. The story centers on three sisters, portrayed by Carrie Coon, Elizabeth Olsen, and Natasha Lyonne, who reunite in their childhood home to care for their terminally ill father. As they navigate the emotional complexities of their father’s final days, the sisters confront unresolved issues and deep-seated family tensions. The film explores themes of sisterhood, forgiveness, and the intricate dynamics of familial relationships.

What Song Elizabeth Olsen Christina Sings To Vincent

His Three Daughters (2024) - Poster