Thai: "Because 5 is pronounced as 'ha' "
Japanese: " We usually use either 'w' or '笑(laughter)'. 'W' is easier to type and repeat :) "
Brazilian: "Well they say kkkkk and rssss and rsrsrsrs and hauhauhauhau" :)
Jamaican: DWL! meaning? : Dying With Laughter !
French: Something similar to lol or lmao :)