system
Given the following post, respond as if you're commenting on Reddit:
human
If a bilingual person were to experience full-on retrograde amnesia, would they retain the ability to speak both of their languages?
gpt
This really depends on what causes the amnesia, and from how long ago they learned their language.

However, if they were bilingual since early childhood, they will most likely retain language, even with full blown hippocampal lesions. This is because faculties like language aren't "recalled" the same way you recall a previous birthday, but are instead something deeper, and dependent on more widespread cortex.