Last time, I was at the office when my friend John, who is a big fan of riddles and traveling, came up to me with a sly smile and a little piece of paper in his hands.
"Hey, you like to hang around on PSE, right?
-Yes, what do you want? You're afraid of introducing yourself on this website? Poor little thing.
-Shut up already, and solve me this. What is the link between the countries written on that paper?
-Oh, a puzzle? Nice, let me think a bit about it...
-Just before you start, I can tell you that Germany and Morocco don't share the link either, but Slovenia does."
Here are the countries I found on the paper :
Spain
Canada
Madagascar
Portugal
Namibia
Russia
Laos
Can you help me to find the link between these countries?
Edit (I hope this edit and the new hint will narrow this puzzle. I will drop another one later): My friend John just contacted me, and told me that these countries also share the link :
Belgium
France
Thailand
Senegal
He also told me that these ones don't share the link :
Switzerland (talking about red and white...)
Denmark
Finland
Ireland
Hint (it has changed!) :
My friend John and I are working in IT. You could say we are sort of webmasters, and we spend much time on the Internet.