I am a Romance Linguist specialized in Iberoromance Linguistics. I am interested in the contact between languages and the results of it. Two main fields of my research are Jewish Spanish and Spanish, Portuguese and Guaraní in South America. I have been studying extensively the language situation in the Guaranitic area. I am one of the directors of the Linguistic Atlas Project known as ALGR (Atlas Lingüístico Guaraní-Románico) whose objective is to provide answers to a series of linguistic questions concerning the Guaranitic area (Paraguay, Northeast Argentina, and parts of Brazil in the borders of Paraguay).

Areas of Specialty

• Language contact between Spanish and Amerindian Languages
• Bilingualism in Paraguay
• Linguistic policies/Language and Society in Latin America
• Romance Languages and Greek

• Atlas Lingüístico Guaraní-Románico (ALGR-L), Tomo II Léxico-Cuerpo Humano. Co-editor and Co-director with Wolf Dietrich, Harald Thun, and Almidio Aquino. Kiel, Westensee-Verlag. [= Dialectologia Pluridimensionalis Roma­nica 11]. 2009.
• Dynamik romanischer Varietaten auserhalb Europas - Alte und Neue Romania im Dialog. Co-Editor with Silke Jansen, Bern; Berlin; Bruxelles, Frankfurt/Main; New York; Oxford; Wien: Peter Lang Verlag. 2009.
• Geschichte und Aktualität der deutschsprachigen Guaraní-Philologie.  Co-editor with Wolf Dietrich. Münster: Lit Verlag, 2008
• Procesos de transferencia en el léxico del castellano paraguayo.” Actes du XXIVe Congrès International de Linguistique et de Philologie Romanes, Aberystwyth, 1er-6 août 2004. Tome I. Eds. David Trotter. Tübingen: Max Niemeyer Verlag, 2007. 565-76.
• Guaraní y “Mawetí-Tupí-Guaraní”. Estudios históricos y descriptivos sobre una familia lingüística de América del Sur. Co-editor with Wolf Dietrich. Münster: Lit Verlag, 2006.
• Sprache in Iberoamerika. Zum 65. Geburtstag von Wolf Dietrich. Co-editor with Volker Noll. Hamburg: Buske, 2005. 
• “Aspectos sintácticos en el habla popular románico de la zona guaranítica.” El español en América. Aspectos teóricos, particularidades, contactos. Eds. Ingrid Neumann-Holzschuh, Volker Noll, and Klaus Zimmermann. Frankfurt/Main: Vervuert, 2005. 235-248. 
• “Os brasiguaios no Brasil: O uso das preposições em e a com o verbo ir.”, O português do Brasil. Perspectivas da pesquisa atual. Eds. Wolf Dietrich and Volker Noll. Frankfurt/Main: Vervuert, 2004. 155-67.
• Das Judenspanische von Thessaloniki: Beschreibung des Sephardischen im griechischen Umfeld. Bern; Berlin; Bruxelles; Frankfurt/Main; New York; Oxford; Wien: Peter Lang Verlag. [= Sephardica 2], 2002