What do these flags have in common? Picture quiz

Here are some rows of flags. Identify what they are, and then work out the link that connects them all.
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Quiz by HelveticaBold
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Last updated: November 13, 2018
First submittedNovember 13, 2018
Times taken31
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What do they have in common?
What do they have in common?
What do they have in common?
What do they have in common?
What do they have in common?
What do they have in common?
+1
Level 71
Nov 14, 2018
I like it :)
+1
Level 69
Nov 15, 2018
Why merci (: