language attrition; linguistic attrition
Linguistics term for the gradual loss of a native or first language, often due to lack of use or contact with another dominant language.
When living abroad for a long time, language attrition of one's native language can occur.
Research on language attrition is closely related to second language acquisition.
hypophrasia
Medical term for a reduction in speech output, often due to neurological conditions. Rare outside clinical contexts.
This patient is showing symptoms of hypophrasia after brain injury.
言語退化 is a broader term for language deterioration, while 言語喪失 specifically refers to attrition of an already acquired language.
失語症 is aphasia, a language disorder caused by brain damage, whereas 言語喪失 (hypophrasia) is a reduction in speech output, often a symptom of a broader condition.
Compound of 言語 (language) and 喪失 (loss). The term is a direct translation of the English 'language attrition' and 'hypophrasia' in their respective fields.