This guy has full blown Dementia Alzheimer's!
Many people with Alzheimer's disease and other kinds of dementia follow a similar path as the disease progresses, yet not everyone exhibits the same symptoms. Cognitive changes such as memory loss are a hallmark of dementia, but challenging behaviors such as foul language can also develop.1
Foul language may stream out of the person's mouth at times, even if they've never uttered a swear word before in their life. Understandably, this can be hurtful and embarrassing to this person's family or friends.