The 5 vowel letters of the Ilokano Latin alphabet — A, E, I, O, U. These five vowels are the foundation of the Ilokano sound system.
Ilokano has a three-way vowel distinction (A, I, U) at its core, with E and O appearing less frequently in native vocabulary. Vowel length and glottalization are phonemically significant in Ilokano — adding a glottal stop after a vowel can change the meaning of a word.
The 13 consonant letters of the Ilokano Latin alphabet — B, D, G, K, L, M, N, P, R, S, T, W, Y.
Ilokano consonants follow Philippine Austronesian patterns. The glottal stop, though not written in the standard alphabet, is an important phoneme. Stress placement is also phonemically significant and can distinguish between word forms with different grammatical functions.
The 1 digraph of the Ilokano Latin alphabet — Ng. This two-letter combination represents the velar nasal sound.
The Ng digraph in Ilokano represents the velar nasal (as in English "sing") and can appear word-initially, which is characteristic of Philippine Austronesian languages. The Ng sound is very common in Ilokano vocabulary.
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