hahahaha

hehehehe

ehüehüehü

eki eki eki- this one I use a lot.

kikikikiki

zuhahhaha

puhahahha

zaaaaaaaaaaaa

nihahaha

hihihiihih

yıh yıh yıh

in Turkish

In Poland we don't laughing.
Sorry, I'm joking, hahah :D

(PS. amazing question!)

Indonesian : "Hahahahaha" but sometimes teenagers in Indonesia type "wkwkwkwkwkwk" to show that we're laughing :D

Well, It's amazing question :) In Ukrainian we say : "ha-ha-ha" or "aha-ha" )))

@Sarah bkkakakak is the same thing like wkwkwkw. we have so many various laughter Sarah jooon :* wkwkwkwk, jiakakakak, brakakakaka, bwahaahahahha etc :D :D