This chapter considers the current state of terminology planning for Irish. In it the unusual and paradoxical sociolinguistic situation of Irish — a symbolically important and often learned language in a bilingual country, where community language transmission is in decline — is summarised, and the consequent implications for corpus development and terminology domains are examined. The thorny questions of term acceptance, term implantation, and in vivo term creation are discussed and the main structures for terminology planning — Foras na Gaeilge, An Coiste Téarmaíochta, Gaois, and Rannóg an Aistriúcháin — presented. A section is devoted to the transformative effect of official language status in the EU since 2007, and the terminology structures created to support that status.