What is the Spanish name for a girl celebrating her fifteenth birthday?

The Spanish name for a girl celebrating her fifteenth birthday is quinceañera.

The word is feminine and is used both for the celebrant and, in common English usage, for the event itself. Its masculine counterpart, quinceañero, can describe a boy celebrating a comparable fifteenth-birthday milestone, although the tradition is much more commonly associated with girls.

The term comes from quince, meaning 15, combined with a suffix identifying a person connected with that age or occasion. In English-language communities, quinceañera is often retained as a loanword rather than translated.

Spelling matters: the ñ is part of the Spanish word. English sources may omit the accent mark over the final a, but the standard Spanish spelling is quinceañera.