Director of the Argentina-Spain cooperation project for preparing the Catálogo de la Colección Foulché-Delbosc of the National Library of Argentina and its electronic edition.
Since 2009, he has been collaborating with SHUMLA, an archaeology and rock art research and education institution in Texas, where he develops work as an ethnolinguist, resulting in a series of publications.
Since 2015, this line of research has been completed with studies that relate Berber and Afro-Romance languages, descendants of African Latin, Basque-Romance, and Andalusi Romance.
These studies led in 2023 to his second PhD, also at the Complutense University, in Religious Sciences and are presented in his 2023 book: Dominio y Lenguas en el Mediterráneo Occidental hasta los Inicios del Español.
Francisco A. Marcos-Marín is the author of over thirty printed books, over three hundred papers, and reviews published in specialized journals, collective volumes, or Festschriften in several countries in different languages.
He has also published two books of poetry and several short stories and has contributed widely to American, Latin-American, and Spanish newspapers, radio, and TV broadcasts.