Can anyone explain what "He said that wrongly" means and why it's better than "He said that wrong?"
'Wrongly' is the grammatically correct form here, because it's an adverb, but most English speakers substitute the adjective 'wrong' these days, and 'wrongly' is falling out of use.
Posted purely for the headline:
I wonder about that too. It sounds more like he said something that he wasn't supposed to, rather than him having said something that is not true.