Spanish provides the name quinceañera for this 15th-birthday tradition.
The word is built around quince, the Spanish word for fifteen. Spanish-speaking communities use quinceañera for the young woman reaching the milestone and often for the celebration honoring her. English-language writing may retain the Spanish spelling or use the unaccented form quinceanera.
The tradition is strongly associated with Spanish-speaking Latin America, especially Mexico and parts of Central and South America. It has also become prominent in Latino communities outside Latin America, including the United States. Local customs vary, so the same word can describe celebrations with noticeably different religious and cultural details.
Portuguese-speaking countries have related coming-of-age celebrations, but Portuguese is not the language that supplies the term quinceañera. The name identifies the linguistic heritage of the custom, while the event itself can incorporate many regional influences.