Work

Differential language recovery in an English-Polish bilingual individual with severe aphasia: a four-year longitudinal case study

Year: 2026

Type: article

Abstract: Purpose: The purpose of this case study is to present factors influencing therapeutic decisions and patterns of language recovery in bilingual post-stroke aphasia, focusing on the impact of single-language therapy on both the treated and untreated language. Case description: A 68-year-old right-handed English-Polish bilingual male with severe post-stroke aphasia received long-term English-based language therapy and was evaluated at four time points over four years. Language abilities were assessed using the Boston Diagnostic Aphasia Examination (BDAE) and the Aphasia Severity Rating Scale (ASRS). Both languages improved in specific functions (BDAE), but overall communicative effectiveness (ASRS) differed markedly. The patient regained basic conversational ability in English, whereas Polish remained nonfunctional, with pathological switching into English. The observed changes were analyzed with regard to the extent and possible limitations of cross-linguistic transfer. Comment: Recovery in bilingual aphasia may differ substantially between languages in specific linguistic functions and overall communicative effectiveness.

Source: Postępy Psychiatrii i Neurologii

DOI: 10.5114/ppn.2026.164947

Authors: Katarzyna E. Polanowska, Aleksandra Zielińska-Michalak

Institution: Institute of Psychiatry and Neurology

Language: English

Topic: Neurobiology of Language and Bilingualism

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: diamond

OpenAlex ID: W7214178462