Expressivity is an intrinsic component of natural language. This article follows the tradition of affective computing (Picard 1997) in using affect to refer to connected concepts such as emotion, mood, feelings, personality, attitude, polarity, and related subjective phenomena. The overview clarifies the relevance of affect for linguistics and computational linguistics, summarizes useful background, outlines helpful resources, and highlights important considerations for computational modeling of affect in language and affect‐related linguistic behaviors. In addition, the article sketches unsettled debates, topics, problems, and areas in need of further exploration.