My major interests in historical linguistics focus on the interplay between the internal and external mechanisms that trigger change in language. I am also interested in the historical and comparative linguistics of Zapotecan and related problems in the historical phonology of Spanish.

• Personal pronouns in Zapotec and Zapotecan
• Late affrication of <ç> and <z>: Evidence from Spanish loans in Zapotec and Trique.
• Spanish loanwords and the historical phonology of Zaniza Zapotec.
• First-person Plural and the Aspect Morphology of Zapotec.
• Los pronombres personales en zapoteco y zapotecano: un estudio diacrónico.
• Los préstamos y la fonología histórica del zapoteco de Zaniza.
• More on the chronology of post-sixteenth-century sound changes in Zapotec and Spanish.
• Zapotec *tty/ty, *ttz/tz
• Two case studies in Zapotec historical phonology

    My major interests in phonology focus on the internal structure of segment-level units, and the nature of phonological primes. My other interests include historical phonology, loanword phonology, and the phonology of the fortis/lenis opposition.

• A new model of intrasegmental consonant structure: Evidence from prevocalization and related processes (Abstract)
• Prevocalization in Maxakalí and beyond
• The phonology of fortis/lenis in Zapotec in the light of loanwords from Spanish.

    My research in Spanish linguistics focuses on diachronic phonology and language contact phenomena. My interest in Black Spanish, a variety of Spanish spoken by the African slaves in the 16th-18th-century Spain and Spanish America, goes back to my 1996 M.A. thesis “A contribution to the history of the villancico de negros”. A continuation of this research is contained in the projected critical edition of 100 villancicos de negro from Madrid National Library (with Derek C. Carr, in preparation). My interest in Spanish-indigenous language contact in Meso-America stems from my fieldwork with Zapotec and focuses on early Spanish loanwords in Meso-American languages, which provide evidence of sixteenth-century Spanish phonology, and rural Oaxacan Spanish, which shows evidence of indigenous substrata in its phonology, lexicon and syntax.

• Late affrication of <ç> and <z>: Evidence from Spanish loans in Zapotec and Trique.
• More on the chronology of post-sixteenth-century sound changes in Zapotec and Spanish.
• The phonology of fortis/lenis in Zapotec in the light of loanwords from Spanish.
• Spanish loanwords and the historical phonology of Zaniza Zapotec.
• Los préstamos y la fonología histórica del zapoteco de Zaniza.
• A contribution to the history of the villancico de negros