Half the letters in an Irish word are not sounds. They are labels on the consonant beside them, saying which of its two versions to use, and once you know which vowels are doing that job the long words shorten to about what they sound like. This is why the spelling is regular in one direction and not the other: you can read almost any Irish word aloud from the page, and you cannot spell an Irish word from having heard it.
That asymmetry is worth knowing on day one, because it decides where to spend effort. Reading is an evening. Writing from sound is a year.
Six rules and the spelling stops looking arbitrary
- consonants come in two sets, broad and slender, and the difference is a real one in the mouth: the tongue is flat for one and raised for the other. Every consonant has both forms and the pair distinguishes words.
- broad with broad and slender with slender. The vowels on either side of a consonant must agree about which kind it is, which is why so many vowels appear to be doing nothing. They are not silent decoration; they are labelling the consonant.
- bh and mh are v or w, decided by whether they are broad or slender, which is how a mutated b still gets a sound.
- dh and gh are silent or y in most positions, which accounts for a large share of the letters a beginner cannot hear.
- the fada marks a long vowel, and it is the only accent in the language. It changes meaning and is not optional.
- aoi is one sound, roughly ee, and it is the standard example of three letters doing one job under the rule above.
Every consonant comes in two
Each consonant has a version made with the tongue pushed forward and one made with it back, and the difference distinguishes words rather than accents. The alphabet has no letter for it, so the vowels next to the consonant carry the information: certain vowels announce the forward version, the others announce the back one, and a consonant between two vowels must have matching announcements on both sides.
That matching rule is why words look long. A vowel is often inserted purely to make the announcement agree, and it is not pronounced as a vowel at all. Delete the ones doing that job and what remains is close to the spoken word.
Eight digraphs, and the rest is arithmetic
The other source of length is the pairs of letters that spell single sounds. An h after a consonant is not an h: the pairs made with b and m give a v or a w, the pair made with c gives the sound at the back of the mouth that English lost, the pairs made with d and g give a y sound or nothing at all, two of them go silent completely, and the rest reduce to h or f.
Eight pairs, learned in an evening, and they are the difference between a word looking impenetrable and looking ordinary. Add the length mark over a vowel, which marks length and not stress, and the reading system is essentially complete.
Where stress goes, and where it does not
Stress falls on the first syllable, reliably, in two of the three dialects. In the southern one it moves to a long vowel later in the word, which is one of the clearest audible markers of where a speaker learned their Irish, and it means the same written word has two different rhythms depending on who is reading it.
A learner should pick the rule that matches their audio and apply it without thinking. Mixing the two produces a rhythm that belongs to nowhere, and rhythm is the part of an accent that listeners react to first.
Four things at once
The four systems the spelling is carrying, and why none works alone
Remove any piece and the writing stops being decodable. This is what a spelling looks like when it has to record a distinction the alphabet has no letter for.
- 01Two versions of every consonantThe distinction being recorded, and the reason the rest exists
- 02Vowels as announcementsPlaced to say which version, and matched on both sides of the consonant
- 03Pairs of letters with hSingle sounds, including two that are silent and one English no longer has
- 04The length markMarks a long vowel, and never marks stress, which is a separate rule entirely
English speakers read the second piece as extra vowels and the third as clusters, which is exactly the reading that makes Irish look unpronounceable. Both are doing narrow, regular jobs.
Where it stalls: reading fine and unable to write
Around the second month a learner can read aloud accurately and cannot produce the spelling of a word they have only heard. They assume they have a bad memory for spelling. They do not: the map runs one way. Several different spellings produce the same sound, and nothing in the sound says which one is right.
The exit is to stop trying to derive spellings and to store them visually, from reading, with the same word met in print several times. It is slow, it is normal, and it is unrelated to how well the language is going otherwise. A learner who accepts that the two skills are separate stops treating one as evidence about the other.
Two things worth using
The speech synthesiser at abair.ie, built at Trinity College Dublin, is the first, and it is the only tool here that will read a word you type in each of the three dialects. It replaced hunting for a recording of the specific word you are stuck on, which usually does not exist, and it is free to use.
A digraph card is the second: eight pairs, their sounds, and one real word each, written on a single card and kept until it is unnecessary. It replaced the pronunciation chapter that describes the whole system before you can read anything, and it costs an evening, after which the long words stop being long.
The mistake: sounding out every letter
The instinct from English is to give each letter something, so a word with three vowels in a row gets three vowel sounds and comes out twice its real length. Irish spelling does not work that way: many of those letters are announcements about the consonants, and announcing is all they do.
The habit that replaces it is to read consonant first. Find the consonants, decide from the vowels around each one which version it is, and then say only the vowels that are left. That reordering takes a week to become natural and it converts spelling from an obstacle into a set of instructions, which is best practised on material simple enough to read at speed, in material just past your level, and why that is the sweet spot. Whether all this counts as hard depends on which part of a language you find hard, which is the subject of where the difficulty sits: script, sounds, or grammar, and hearing the system rather than reading about it is switching your phone, your music and your commute.
The next question is what happens at the front of the word, since the letter you are reading first may have been put there by the grammar rather than by the word itself, in why the start of a word changes, and what triggers each. And the rhythm question has a whole page of its own, because the three dialects differ in more than stress, in Munster, Connacht and Ulster, and which to learn.