If you want a lot more information about stroke and linguistics, I highly recommend the book "One Hundred Names for Love: A Memoir" It's about an older married couple, both wordsmiths by trades (linguistics professors? I can't remember). The husband has a stroke leaving him with a single word vocabulary.
It documents what they did in his recovery process as well as mentions the various types of language impairments that can come with stroke. It's a great book - touching and educational.
IIRC, the book mentions that strokes affect single native language, dual native languages, and post childhood acquired languages differently. And that if you want to be able to communicate after a stroke you best bet is to learn another language. Though it's been several years since I've read the book.