2017 Keynote speaker."Assessing the permeability of cognate systems in Portuguese-Spanish bilingual communities: A variationist approach". Bilingualism in the Hispanic and Lusophone World (BHL). Florida State University. January 27-29, 2017.
2016 Keynote speaker. “Assessing the permeability of cognate languages in contact”.XI Samuel G. Armistead UC Davis Colloquium on Latin American & Peninsular Languages, Literatures, and Cultures. October 21-22, 2016.
2016 Invited Panelist, "The current status of studies in language attitudes in the Lusophone world". 1st International Symposium on Language Attitudes toward Portuguese, Spanish, and Related Languages.Fort Wayne, Indiana. April 9, 2016.
2016 Keynote speaker, “Why study variation?.” Spanish Linguistics Conference. Arizona State University. March 25, 2016.
2016 Guest speaker. "Real vs apparent time in assessing change in progress". University of Texas at Austin. February 11, 2016. (via Skype)
2014 Plenary speaker at the 5th Symposium on Portuguese for Spanish Speakers. The Universidad Nacional Autónoma de México on October 29-31, 2014.
2014 Guest speaker, “Portuguese for Spanish speakers in the curriculum”. An NEH-funded lecture to be given at California State University, Long Beach, on September 14, 2014.
2014 Guest speaker, “Portuguese in contact with Spanish: Evidence for linguistic divergence. University of Georgia, April 11, 2014.
2014 Guest speaker, “Linguistic divergence among Spanish-Portuguese bilinguals.” University of Illinois at Urbana-Champaign, April 18, 2014.
2014 Guest speaker, “Portuguese in contact with Spanish: Evidence for linguistic divergence. The University of Georgia, April 11, 2014. (
2014 Guest speaker, “Linguistic divergence among Spanish-Portuguese bilinguals.” The University of Illinois at Urbana-Champaign, April 18, 2014.
2013 Invited as a keynote speaker of PLUS: Portuguese Linguistics in the United States, that took place at the University of Georgia, November 14, 2013. Invitation declined for family reasons
2013 Guest speaker, “Bilingualism in society and in the mind: How cool is that?” Gridley Middle School, Tucson, AZ. Nov 8, 2013.
2013 Guest speaker, “/s/ Aspiration in Uruguayan Spanish and the notion of linguistic prestige”. Louisiana State University. March 27, 2013. (via Skype).
2013 Guest speaker, “Portuguese/Spanish Interfaces”. University of Michigan, Ann Arbor. Department of Spanish and Portuguese. March, 13, 2013.
2013 Keynote speaker, “Sociolinguistic continuities in language contact situations: the case of Portuguese in contact with Spanish along the Uruguayan-Brazilian border”. Spanish in the US and Spanish in contact with other languages to be held on March 6-10, 2013, McAllen, Tx.
2012 Plenary speaker, "Sociolinguistic patterns in language contact situations". Ohio State University Congress on Hispanic and Lusophone Linguistics (OSUCHiLL) April 27-28, 2012.
2012 Guest speaker, “A língua portuguesa nos Estados Unidos”. III Seminário de Sociolinguística, Universidade Federal do Espírito Santo, Vitória, Brazil. March 13, 2012.
2010 Keynote speaker, “ Aprender Português a partir do Espanhol – Contribuições para o Estado da Arte.” IX Sociedade Internacional de Português Língua Estrangeira (SIPLE). Universidade de Brasília, Brasília, Brazil. Octuber 6, 2010. Opening plenary speaker (Conferência plenária de abertura).
2009 Guest speaker, “A distribuição social do português em contato com o espanhol em comunidades bilíngües no Uruguai.” Universidade da Coruña. Área de Lingüística Xeral. Coruña, Galicia, Spain. November 18, 2009. Guest Speaker.
2008 Plenary speaker, “Variedades do português em contato com o espanhol em contextos de bilingüismo social e contextos de aquisição: uma comparação”. III Symposium on Portuguese for Spanish Speakers held at Universidade Estadual de Campinas (UNICAMP), in Campinas, Brazil, on July 22, 2008. Invited plenary speaker.
2008 Guest speaker, “O papel do conhecimento metalingüístico nos padrões de transferência no desenvolvimento da interlíngua e suas implicações pedagógicas.” I Simpósio Mundial da Língua Portuguesa, held at the Universidade de São Paulo (USP), on September 2, 2008 in São Paulo, Brazil.
2007 Keynote speaker, “Questões Fundamentais no Ensino de Português nos Estados Unidos.” 5th Annual Conference on Portuguese Language Education UMass, Darmouth. September 28, 2007.
2006 Guest speaker, “Padrões sociolingüísticos em situações de contato: O caso do português em contato com o espanhol”. Universidade Nacional de Brasília. III Encontro Nacional do GELCO. October 10, 2006.
2005 Guest speaker, “Uruguayan Portuguese: Use, form and context.” University of California at Riverside. May 5, 2005.
2004 Guest speaker, “The sociolinguistic distribution of Uruguayan Portuguese in a bilingual border town". Guest speaker at the Department of Spanish and Portuguese, Georgetown University, Washington D.C. Feb 6, 2004.
2002 Guest speaker, “Diagnóstico sociolingüístico de la población escolar de Artigas y Rivera”. Presented for the Administración Nacional de Educación Pública, as part of Proyecto Mejoramiento de la Calidad de la Educación Primaria. República Oriental del Uruguay. November 22, 2002.
2002 Guest speaker, "La estratificación social y el uso del portugués uruguayo.” Universidad de la República de Uruguay. June 24, 2002.