Is "mist" the accepted word for fog in Dutch? Because in English, I think of mist being very different from fog.
Yes, I think that the Dutch use "mist" for what in English is typically called fog. For the English word "mist", we might use "nevel" (cognate of "nebula").
This makes it all the harder for those learning from German, for fog in German is 'Nebel', and mist 'Dunst'. So many false friends with which to cope!
It is very misty this morning would, should be OK, but not. Is there a massive difference?
In terms of meaning, both sentences convey the same idea, but in terms of grammar, their structures are different.
There is a lot of mist this morning.
Er is veel mist...
It is very misty...
Het is zeer mistig...
Do you see the difference now?