Making nouns plural in Spanish is slightly more complicated than in English, but it’s not too bad.
1. If the noun ends in a vowel, add S.
2. If the noun ends in any consonant except Z, add ES.
3. If the noun ends in Z, change the Z to a C and add ES. (Why?)
What did I tell you – pretty easy, right? Now try the test.
Note: The same rules apply when pluralizing adjectives.