I am Mexican and I have learnt English a few years ago... When I am chatting with my friends in instant messenger program I always write "jajaja" to show that I am laughing, I do this when the chat is in Spanish, when I chat in English I always write "hahaha" because that's what I know for my Spanish "jajaja". What I was wondering is that if there are different "jajaja or hahaha" in other languages. I know some German but since I always speak languages more than what I write them I am not quite sure of what to write in case I chat in that language... What about the others??