The Irish Language Grimoire — Grammar
Irish belongs to the Goidelic branch of the Celtic family, alongside Scottish Gaelic and Manx. It is older as a written language than English. Some of its features are unfamiliar to English speakers, but they are not arbitrary. They are how the language tracks meaning that English tracks with prepositions and helping verbs.
The grammar guide is split into nine focused pages. Each one covers a single topic in depth with worked examples and an interactive drill. Read them in order if you are starting out, or jump straight to whichever construction the translator just sent you to.
1. Initial Mutations: Lenition and Eclipsis
Irish nouns and verbs change their first consonant in certain grammatical contexts. The two systematic changes are séimhiú (lenition) and urú (eclipsis). Recognising them is the difference between hearing Irish as noise and hearing it as structure.
2. Word Order: Verb-Subject-Object
Irish is a VSO language. The verb comes first, then the subject, then the object. Questions and negatives are formed by particles, not by an auxiliary verb like English “do”.
3. Two Verbs for “To Be”: Is vs Tá
Irish splits the work of “to be” between two verbs. Tá covers states, conditions, and locations. Is covers classification and identity. The choice depends on what you are saying about the subject.
4. Verb Conjugation
Two regular conjugation classes plus eleven irregular verbs. Once you know the patterns, the tense system (present, past, future, conditional, habitual past) becomes predictable.
5. Noun Gender, Declension, and the Article
Every Irish noun is masculine or feminine. The gender controls which mutations the article an triggers. Irish has no indefinite article: there is no Irish word for “a” or “an”.
6. The Genitive Case
Where English uses “of”, Irish inflects the noun itself into the genitive case. “The door of the house” becomes doras an tí, with tí being the genitive form of teach. There is no separate Irish word for “of”.
7. Prepositional Pronouns
Irish fuses prepositions with the pronouns that follow them. Ag + mé becomes agam, ar + tú becomes ort. This is also where Irish locates the construction for possession: Tá madra agam means “I have a dog”.
8. The Schwa Rule and Pronunciation
Unstressed vowels reduce to a schwa-like sound in native speech. Anglicised respellings sometimes mislead. This page covers the rule and gives you the listening drill the rest of the Grimoire relies on.
9. Putting It Together
The reverse translator parses any short Irish sentence into colour-coded components, showing the grammar of the language at work. Use it to test what you have learned.
The interactive drills on these pages run entirely in your browser. They are part of the Spell-Caster translator. Browse the vocabulary Grimoire for the curated lexicon the translator works from, or return to the Spell-Caster translator to put the grammar to use.