John Butt is Emeritus Professor of Hispanic Studies of King's College London, UK. He studied Spanish, French and Portuguese at the University of Cambridge and went on to lecture in Spanish literature and language at King's College London for 37 years.

Carmen Benjamin, a native speaker of Spanish, taught Spanish at King's College London, UK.

Antonia Moreira Rodríguez, also a native speaker of Spanish, teaches Spanish language and linguistics in the Department of Spanish, Portuguese and Latin-American Studies of King's College London, UK.