Resumen: This paper deals with Plutarch’s work in order to establish, by means of its linguistic traits, the degree of dominance of the two linguistic-literary trends prevailing at this time: on the one hand, the Common Language, or Koine, which became the standard variety of the Greek language after an evolution starting from the Ionic-Attic High Variety; on the other, the Atticism, a reaction to this vulgarization or colloquialization that seeks the creation of a high variety for Literature, inspired by the nostalgic memory of a lost Golden Age. In short, we shall attempt to unravel whether Plutarch issues a nostalgic Atticist attempt to return to an idealized past or also evidences a relationship of diglossia rooted in the Attic dialect from the rise of Koine. Idioma: Inglés DOI: 10.1484/J.EUPHR.5.125302 Año: 2019 Publicado en: Euphrosyne 47 (2019), 295-308 ISSN: 0870-0133 Factor impacto SCIMAGO: 0.101 - Classics (Q3) - Linguistics and Language (Q4) - Language and Linguistics (Q4)