Full Professor, Department of Anthropology, Universidad Autónoma Metropolitana, Mexico City. Ph.D. in Linguistics, University of Frankfurt, Germany, 1988.

Research fields: Sociolinguistics, Applied Linguistics, Anthropology of Education and Discourse Analysis.

Subjects: bilingualism and bilingual education, language policies, sociolinguistic processes.

Coordinator of the ALFAL (Latin American Association of Linguistics and Philology) permanent project “Politiques linguistiques en Amérique latine”.
Directeur of the interinstitutional program “Indigenous Community and Bilingual Intercultural Education”, UAM‑UPN.

Member of the UNESCO Chair on Multilingualism Policies.

Member of the Mexican Academy of Sciences since 1992.

Over 80 publications in Spanish, English, French, German and Portuguese.

Professor and visiting scholar at the universities of Stanford, UC Santa Barbara, UC San Diego, USA; Campinas and Belem, Brazil; Frankfurt, Mannheim, Freiburg, Germany.