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Riaghailtean litreachaidh

Letter rules

Gaelic spelling looks unpredictable at first, but it is far more regular than English. A handful of rules explain almost every word — and once you know them, you can read a word aloud you have never seen before.

Slender with slender, broad with broad

Caol ri caol, leathann ri leathann

This is the rule that shapes Gaelic spelling more than any other. A consonant, or a group of consonants, must have vowels of the same kind on either side of it: slender (e, i) on both sides, or broad (a, o, u) on both sides.

It exists because a consonant sounds different next to a slender vowel than next to a broad one, and the vowels on either side are there to agree about which sound is meant. That is why so many Gaelic words seem to have spare vowels — some of them are not pronounced at all, and are only there to mark the consonant beside them.

You see the rule at work whenever an ending is added. The same plural ending is written -an after a broad vowel and -ean after a slender one:

WordPluralWhy
bròg (shoe)bròganThe last vowel, ò, is broad, so the ending starts with broad a.
sgoil (school)sgoileanThe last vowel, i, is slender, so an e is added to keep the l slender.

A handful of words break the rule — esan (him, emphatic) is one — and compound words often break it where the two parts meet.

The accent makes a vowel long

Stràc

Only vowels can take an accent, and modern Gaelic uses just one kind: the grave accent, which slopes down to the right (à, è, ì, ò, ù). It tells you the vowel is long.

Older books also use an acute accent on é and ó. The Gaelic Orthographic Conventions, the spelling standard used in schools and publishing, replaced these with the grave accent.

The accent is not decoration. Leaving it off can give you a different word, and it is required in exams.

Adding an h: lenition

Sèimheachadh

Grammar often softens the first consonant of a word, and in writing this is shown by putting an h after it. It happens after words like mo (my), glè (very) and the feminine article, and in the past tense of verbs — the grammar page lists the triggers.

Only nine letters can take the h: b, c, d, f, g, m, p, s and t. Vowels never do, and neither do l, n and r (their sound can soften, but the spelling stays the same). An s followed by g, m, p or t is also left alone, so sgoil stays sgoil.

LetterWith hSounds like
bbhv
cchthe ch in Scots loch
ddha throaty gh, or y beside e and i
ffhusually silent
ggha throaty gh, or y beside e and i
mmhv, often nasal
pphf
sshh
tthh

Every one of these combinations is covered with examples on the sounds page.

Hyphenated t- and h-

Ro-leasachain

Sometimes a t- or h- is joined to the front of a word with a hyphen. It is not part of the word itself — grammar adds it, usually to stop two vowels running into each other — and it is pronounced as if it were.

t- comes after the article an: before a masculine word starting with a vowel, and before a feminine word starting with s followed by a vowel, l, n or r. h- comes before a vowel after words like na (the, plural), a (her) and le (with).

The prefix is always lower case, even when the word after it has a capital.

Apostrophes mark a dropped letter

Asgair

As in English, an apostrophe shows where a letter has been left out. You will meet it in a few very common places:

Capital letters

Litrichean mòra

Names of people and places, languages, and days of the week start with a capital, much as in English. When a name has a lenited first letter or a hyphenated prefix, the capital goes on the name itself, not on the h or the prefix.