Evidence strongly suggests that language disorders are highly heritable, meaning they are often passed down genetically from parent to child.

Michigan State University

Language disorder prognosis can be influenced by both Environmental, and Genetic and Physiological factors.

Risk and Prognostic Factors of Language Disorder

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed., Text revision). https://doi.org/10.1176/appi.books.9780890425596

DSM-5-TR

Environmental factors include bilingualism. Bilingualism DOES NOT cause language disorders, but bilingualism may cause delays or differences in language development. However, a language disorder in bilingual children will affect both languages; therefore, assessment across both languages is critical.

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