The Tuvaluan alphabet consists of only 15 Latin letters [1] — A, E, F, G, I, K, L, M, N, O, P, S, T, U, V — making it one of the smallest alphabets used by any natural language. The letters B, C, D, H, J, Q, R, W, X, Y, and Z do not appear in the native Tuvaluan vocabulary. They may appear occasionally in recent loanwords from English, but are not considered part of the core Tuvaluan alphabet.
This small letter inventory is a consequence of Tuvaluan's simple phonological system: the language has only 10 consonant phonemes and 5 vowel phonemes, with a strict syllable structure where every syllable is either a single vowel (V) or a consonant followed by a vowel (CV). This means there are no consonant clusters in native Tuvaluan words, and every consonant must be followed immediately by a vowel — giving the language its distinctive open, flowing sound.