Writing Ha facts

While investigating facts about Writing Ha, I found out little known, but curios details like:

In Thai, the number 5 is pronounced "ha" -- so instead of saying "hahahahaha," Thai speakers will sometimes write "55555."

Ha-ha and he-he and ho-ho have all been used to write out laughs in English for centuries, but ha-ha has been the most popular since the early 19th century

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 2 of the best facts about Writing Ha I managed to collect.