It is not a stroke. It’s considered a “software” problem. A stroke is considered “hardware.”
I would assume she has been seen by a physician or a specialist in neurological disorder. She probably would need a full workup to rule out so many different reasons for the symptoms..myasthenia gravis, multiple sclerosis and it’s variants, guillan-barre syndrome( even a simple cold can cause it). Early onset Parkinson’s,dementia,Psychological causes, self harm, poisoning(environmental or inadvertant), someone might be abusing her, side effects of any medication or chemical substance, electrolyte imbalance, all come to mind as low possibility causes. I wish her the best, and I hope the cause of the disorder is determined.