What is the usual Spanish plural for two or more quinceañera celebrations?

The usual Spanish plural for two or more female quinceañera celebrations or celebrants is quinceañeras.

Spanish forms the plural by adding -s to a word ending in an unstressed vowel. Thus, quinceañera becomes quinceañeras. In English writing, the singular word is also commonly used as a borrowed cultural term.

The word can refer to the young woman reaching 15, the birthday celebration, or, depending on context, the broader tradition. That flexibility sometimes causes confusion in English-language descriptions.

Quinceañero is the masculine singular form and has a different plural form, quinceañeros. The ñ is also important: it is a separate Spanish letter and changes the spelling and pronunciation from forms written with n alone.