As was fitting for a show dedicated to a Dada scholar, “FMSBWTÖZÄU PGGIV-..?MÜ (FOR STEPHEN FOSTER)” examined the disruptive capacities of invented languages and the material qualities of letters, symbols, and words. The eponymous curator, historian, and writer, who died in 2018, was a professor emeritus in the School of Art and Art History at the University of Iowa and a mentor to the gallerist Shane Campbell, who is an alumnus of Foster’s department. Foster’s curatorial work included the influential exhibitions “The Avant-Garde and the Text,” cocurated with Estera Milman at the Visual Studies