Impreasin na Gaeilge / Impressions of the Irish language (2014) is a research book on the sound of the Irish language based on native voices of the Gael from the Gaeltacht itself. The book is based on empirical work by two authors from County Clare. An tAthair Seóirse Mac Clúin based Réilthíní Óir on the Irish of the Great Blasket Islands. Réilthíní Óir comprised the native Irish of Tomás Ó Criomhthain and the islanders of the Great Blasket Islands prior to 1922. The original title is revised in full with modern additions based on current native Irish (2007-2014). The language planning researcher is Seosamh Mac Ionnrachtaigh from Kilrush West Clare. This combined research results in an Irish-Irish Dictionary of the Irish language with key explanations in English.