The Guzmán Ariza Institute of Lexicography (IGalex) is a nonprofit institution funded by the Guzmán Ariza Foundation and dedicated to lexicographic research and resources. Its work focuses particularly on the vocabulary and linguistic heritage of the Dominican Republic. The institute’s featured projects include the Dictionary of Dominican Spanish, the Dominican Legal Dictionary, and the Lexical Treasury of Dominican Spanish.

It also shares publications and bibliographic material on Dominican Spanish, alongside news about its research, events, and collaborators. Igalex supports access to language references through links to dictionaries such as the Dictionary of the Spanish Language, the Dictionary of Americanisms, and the Pan-Hispanic Dictionary of Legal Spanish. Its online tools section points users to historical and contemporary Spanish-language dictionaries and corpora, including resources covering Spanish in the Americas.

In addition to research and publications, the institute offers formation and outreach activities. Through these projects and resources, Igalex promotes the study and dissemination of Dominican lexicography and Spanish-language vocabulary