I guess the claim is older than 2020:

Who knew Joe Biden stuttered as a child? Indeed, the loquacious vice president is more known for his steady torrent of words, which, coupled with an outgoing personality, belie the awkward, often humiliating, hurdles he had to overcome as a child.

Good for him. But he doesn't stutter now. He's showing signs of senility.

Btw, fuck the Nazi-sympathizing king that that movie glorifies :gui-trans: