Every culture has a word for democracy.
a. true
b. false

No, I don;t think that this is true.
This statement is false if there is even one culture that does not have such a word.

Now, some of the human cultures are not integrated into the global culture -and there are even some uncontacted tribes in the Amazon and in the Indian Ocean.

Since Democracy is a system originating in ancient Greece- it  unlikely that they have a word for democracy, at least in the meaning that we use.

The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects