Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder, present from early development, which is characterized by difficulties with social communication and social interaction and repetitive patterns in behaviors, interests, and activities. Although insufficient or atypical language skills are not a fundamental diagnostic criterion for ASD, they are one of the earliest signs and the first sign of parental concern. Researchers most often state about two subgroups of children with autism based on their language abilities, children with impaired language abilities and children without language impairment. The aim of this paper is to present current knowledge about the language abilities of preschool children with ASD in all components of language. Furthermore, the second aim of this paper is to determine if children with ASD are characterized with certain language specifics and to conduct a review of available research about language abilities of Croatian children with ASD. Review of literature shows a great degree of heterogeneity in children with ASD, which is also reflected in their language abilities. Although some children with ASD differ in language abilities, it seems like their language development, with some atypicality, follows the typical development. Nevertheless, children with autism have somewhat different mechanisms while language acquisition. Furthermore, their language production is characterized by neologisms, jargon, and idiosyncratic phrases. The morphosyntactic development of children with ASD is mostly in common with their overall language abilities, however, some authors’ explanation of the simpler morphosyntax of children with ASD found in the underlying symptoms of ASD. In conclusion, even though the language abilities of children with ASD differ, most authors agree that the main troubling is manifested in the use of language in a correct and socially acceptable way. Apropos, almost all children with autism show pragmatic difficulties. Moreover, while reviewing Croatian literature, it has been noticed a significant lack of research about the language abilities of Croatian speaking children with ASD.