If you see something hilarious on Russian Facebook, you'll know exactly what to do.
Japan: wwwwwwww
The Japanese gaming world was quick to adopt "w" for the word "warai" which means laughing. Now, the more wwwwwww's the better!
Source: world104.com
Israel: חחח/ההה
The letter ח is pronounced ‘kh’ so putting a bunch together is khkhkhkhkh which is kind of like hahahah
Source: @Jews_News
Source: @emi1ie
Sweden: *asg*
*asg* is an abbreviation for asgarv which means intense laughter in Swedish
Source: @search