This volume offers a comprehensive examination of mitigation in speech in English and Spanish, exploring how it is defined and theorized and the various linguistic features employed to soften or downgrade the impact of a particular message across a range of settings. Building on the body of work done on mitigation in English, the book begins by discussing how it has been conceptualized in the literature, drawing on politeness theory among other perspectives from pragmatics, and highlighting increasing research on these topics in native and bilingual Spanish speakers and learners of Spanish. The volume explores examples from a variety of discursive contexts, including institutions, courts, and classrooms, to unpack mitigation as it occurs in spontaneous speech through different lenses, looking both at the actual units of discourse but also taking a broader view by examining differences across dialects as well. The book also looks at the ways in which conclusions drawn from this research might be applied pedagogically in language learning classrooms. This volume will serve as a jumping-off point for broader discussion in the field of mitigation and will be of particular interest to graduate students and researchers in pragmatics, sociolinguistics, and discourse analysis, in addition to learners and pre-service teachers of Spanish.