Translators are not mentioned in the in-text citation, but are listed in the reference list. If known, also state the original year of publication.
Shakespeare, W. (2015). Romeo y Julieta (Á.-L. Pujante, Trans.). Austral. (Original work published 1595)
Parenthetical citation: (Shakespeare, 1595/2015)
Narrative citation: Shakespeare (1595/2015)