What is the difference between 'mnoho' and 'hodne'?
To denote a quantity - mnoho is more formal than hodně.
As an adverb modifying some adjectives you can only use hodně in the same meaning as velmi: hodně velký=very big.
Again, duolingo offers “mít” as if it was an English word option.
It chooses the words randomly. It can chose Swahili words if it wants... No need to report, we can't do anything anyway.