Schizophrenia impacts several cognitive systems including language. Linguistic symptoms of schizophrenia are important to understand due to the crucial role that language plays in the diagnostic and treatment process. However, the literature is heavily based on monolingual-centric research. Multilinguals demonstrate differences from monolinguals in language cognition. When someone with schizophrenia is multilingual, how do these differences interact with their symptoms? To address this question, we conducted a pre-registered PRISMA-SR scoping review to determine themes in the literature and identify gaps for future research. Four hundred and twenty records were identified from three databases in 2023. Thirty articles were included in the synthesis. We found three emergent themes: (1) the need for multilingual treatment options, (2) differences in symptomology between the L1 and L2, and (3) the impact of cultural factors on linguistic functioning. Thus, several avenues of research regarding multilingualism may be fruitful for improving linguistic and social outcomes in schizophrenia.

中文翻译：

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多语言和精神病：预先注册的范围界定审查


精神分裂症会影响包括语言在内的多个认知系统。由于语言在诊断和治疗过程中起着至关重要的作用，因此了解精神分裂症的语言症状很重要。然而，这些文献在很大程度上基于以单语为中心的研究。多语言者在语言认知方面表现出与单语者的差异。当精神分裂症患者会说多种语言时，这些差异如何与他们的症状相互作用？为了解决这个问题，我们进行了一项预先注册的 PRISMA-SR 范围综述，以确定文献中的主题并确定未来研究的差距。2023 年，从三个数据库中确定了 420 条记录。综合中包括 30 篇文章。我们发现了三个新兴主题：（1） 对多语言治疗方案的需求，（2） L1 和 L2 之间的症状差异，以及 （3） 文化因素对语言功能的影响。因此，关于多语言的几种研究途径可能有助于改善精神分裂症的语言和社会结果。