In April 2019, Professor Emerita Darlene J. Sadlier was honored at a book signing held at the Instituto Nacional-Casa da Moeda (INCM), Portugal's oldest publishing house, for the new translation of her book The Portuguese-Speaking Diaspora: Seven Centuries of Literature and the Arts, which was originally published in 2016 by the University of Texas Press. The book is the first detailed analysis of the different and sometimes conflicting cultural productions of the imperial diaspora in its heyday and offers an important context for understanding the more complex and broader-based culture of population travel and displacement from the former colonies to present-day "homelands."

The book signing occurred in the famous rare book library of the INCM, where presentations were made by press director Duarte Azinheira and Teolinda Gersão, one of Portugal's most distinguished novelists. In attendance were faculty, students, press administrators, and members of the general public. After the formal presentations, Sadlier spoke about her longstanding interest and wide-ranging research for the book, which took her to several countries as well as the city of Macau. After signing copies of her book, she attended a formal reception held by the press in the building's large and elegant foyer.

Among other events organized for Sadlier during her visit was a live interview for an arts and culture radio program and a luncheon with the Secretary of State for Diasporic Affairs. She was honored at another luncheon given by Mário Matos dos Santos, director of the Casa de Macau, whose library was among the many research centers she consulted for the book. The publication of the translation was widely advertised in Lisbon and elsewhere, with full page notices appearing in the Jornal de Letras, Portugal's most important literary supplement.