I gave a few quote to Jessica Hullinger on the psychology behind Twitter and Facebook’s use of icons
“As they seek to completely dominate the entire Internet, it becomes not economically viable to translate everything into local languages,” says McMahon. “So they’re trying to go for primeval symbols anybody can understand but that is going to be one hell of a psychological task.”
Why Social Media Deliberately Manipulate Your Emotions, Fortune, December 30th 2015..