Spanish supplies the name “quinceañera” for the traditional celebration.
The word is built around quince, the Spanish word for 15. Its spelling includes ñ, a Spanish letter pronounced with a palatal nasal sound, and the feminine ending identifies the female celebrant. Spanish-language usage can apply the noun to the young woman, while English commonly extends it to the event itself.
The celebration exists across many countries and communities, so local vocabulary may add terms for sponsors, attendants, ceremonies, or dances. Those regional differences do not change the Spanish origin of the central name.
Portuguese-speaking countries have related coming-of-age customs, but Portuguese is not the source of the word quinceañera. Similarly, French and Italian have their own words for fifteen, yet neither language supplies this distinctive cultural term.