A stroke can definitely affect your speech, so some people may not pronounce their words as they did before. In some cases it might sound to others as if they have a “foreign accent”, especially if they can no longer pronounce some sounds like “th” or “r” well, which are also sounds that non-English speakers have trouble with.
As for suddenly being able to speak a language they never knew? No. I have heard of some people becoming more artistic or creative, but that could be from damage to other parts of the brain that previously inhibited that behavior.
I’ve always said (jokingly since I’m an atheist) that Christians got it mixed up and thought Satan was God, so they’ve really been worshiping Satan all this time. They don’t want to admit they’re wrong about him being good, so they make up all kinds of excuses for all the horrible things he does. That’s why they were totally conditioned and ready to do the same with trump.