She studies phonology and its interaction with morphosyntax, and she is specifically interested in incorporating data from understudied languages into the phonological and morphological theoretical literature. Hannah also carries out documentary work. Since the fall of 2013 she has been documenting Guébie, an endangered Kru language spoken in southwest Côte d'Ivoire. A frequent visitor to West Africa, Hannah began working as the contact for Afranaph consultants in francophone Africa in early 2015.