Miroslav Krleža's works are marked by the use of the Kajkavian at different textual levels. This paper examines how the Kajkavian language served as a means of shaping various literary representations of Kajkavian identity. An analysis of selected texts – the drama Feast of Kraljevo and In the Camp, novels from the cycle Croatian God Mars, and the novel On the Edge of Reason – examines whether there are common features of Kajkavian characters and questions their affiliation to the same collective identities. In Krleža's works, the Kajkavian language served as a tool for the linguistic, psychological, and social characterization of characters, but it also shapes their belonging to the same linguistic, regional, cultural, and class identity. At the same time, identification is understood as a continuous process, and every collective identity is unstable and changeable, dependent on the space and time in which it is formed. Detailed insight into selected texts points to the accentuation of social origin and class identity of Kajkavian characters, especially in the social and political circumstances of the First World War. The Kajkavian dialogic and narration language has served as a language of resistance and rebellion against linguistic discrimination and all forms of violence, that is, as a speech that opposes the hegemony of dominant social groups and dominant culture.