Spanish phonology describes the sound system of the Spanish language, including vowels, consonants, syllable structure, stress, and intonation. Compared with many European languages, Spanish phonology is regular and learner-friendly.

1. Vowels

Spanish has a simple and stable vowel system with five vowel phonemes.

Vowel IPA Example

a /a/ casa

e /e/ mesa

i /i/ vino

o /o/ loco

u /u/ luna

Features:

• Vowels are pure (no diphthongization like in English).

• Vowel length does not change meaning.

• Pronunciation is consistent across contexts.

2. Diphthongs and Triphthongs

Spanish allows combinations of vowels within one syllable.

• Diphthongs: ie (tierra), ue (bueno), ai (bailar)

• Triphthongs: uai (Uruguay)

Stress determines whether vowels form a diphthong or separate syllables.

3. Consonants

Spanish has about 19–20 consonant phonemes, depending on dialect.

Key characteristics:

• b / d / g have two pronunciations:

Stop sounds after pauses or nasals

Approximants [β ð ɣ] between vowels

• r vs rr:

Single r: flap [ɾ]

Double rr: trill [r]

• ñ /ɲ/: palatal nasal (as in niño)

• ll /ʎ/ and y /ʝ/ often merge (yeísmo) in many regions

4. Syllable Structure

Basic structure:

(C)(C)V(C)(C)

• Consonant clusters are limited and systematic.

• Many syllables end in a vowel, giving Spanish its open, rhythmic sound.

5. Stress (Accent)

Spanish has phonemic stress, meaning stress can change meaning.

• hablo (I speak)

• habló (he/she spoke)

Stress rules:

• Words ending in a vowel, n, s → stress on the penultimate syllable

• Other endings → stress on the final syllable

• Accent marks override default rules

6. Intonation and Rhythm

• Spanish is often described as syllable-timed

• Intonation patterns mark questions, statements, and emphasis

• Yes–no questions typically have rising intonation