  Following the Mapuche grammar by Smeets, this article describes the main
morphophonological aspects of Mapud\"ungun, explaining what triggers them and
the contexts where they arise. We present a computational approach producing a
finite state morphological analyser (and generator) capable of classifying and
appropriately tagging all the components (roots and suffixes) that interact in
a Mapuche word form. The bulk of the article focuses on presenting details
about the morphology of Mapud\"ungun verb and its formalisation using FOMA. A
system evaluation process and its results are also present in this article.
