Abstract
In many languages, inflectional morphology is not uniform across the lexicon, with groups of lexemes falling into different inflection classes. These form at times highly complex systems whose structure has come under increasing scrutiny in contemporary morphological theory (e.g. Ackerman, Blevins & Malouf 2009, Finkel & Stump 2009, Brown & Hippisley 2012). The Oto-Manguean language are of particular interest because their diverse means of inflectional exponence allow for multiple parallel inflection class systems, adding an additional layer of complexity.