What is the usual Spanish plural for more than one quinceañera celebration?

The usual Spanish plural for more than one quinceañera celebration is quinceañeras.

Spanish normally forms the plural of a noun ending in an unstressed vowel by adding -s. Because quinceañera ends in -a, its plural is quinceañeras, with the ñ retained.

The word can refer to multiple celebrants or, depending on context, multiple celebrations. The masculine plural quinceañeros is a different form and should not be substituted when referring specifically to feminine celebrants or celebrations called quinceañeras.

Spanish usage can vary in bilingual English contexts, where the word is sometimes treated as an English loanword. In standard Spanish spelling, the accent mark remains on the á in both the singular and plural.