English is the primary language spoken in the 2006 film Quinceañera.
The film is an American independent drama about a Mexican American family in Los Angeles. Although its cultural setting includes Spanish-speaking heritage and Mexican American traditions, the film’s main dialogue is in English. That combination reflects the bilingual and bicultural realities of many Latino communities in the United States.
The title and subject can lead viewers to assume that the movie is primarily in Spanish. A film’s cultural focus, however, does not determine its principal language. Quinceañera uses its language choices to portray characters living within an English-speaking American environment while maintaining strong family and cultural connections.
This answer refers specifically to the 2006 feature film, not to quinceañera celebrations generally. Actual celebrations may take place in Spanish, English, Portuguese, or multiple languages depending on the family and country. The film’s language classification is therefore a precise production fact rather than a statement about the tradition itself.