What culture are those? Scandinavian? Those often just say nothing.
Scandinavian are quite different between each others as well.
I'm Greek. I don't know about other Mediterranean cultures, but I assume they're similar.
The Dutch especially. It's refreshing
After having worked with people from former Eastern Bloc countries, I would nominate a few of them for direct communication, e.g., "I won't do that because it is a stupid idea," or, "Can we discuss this when you know what you're doing?"
Scandinavian cultures are not uniform also. Danes can be very direct; Swedes - not so much.
Depends on the culture as you said, but some of them are even less direct than English speaking countries. Japan for example.
That's not human communication, that's Anglosphere communication. Other cultures are much more direct and are finding it very hard to work with Anglos (we come across as rude, they come across as not saying things they should be saying).