I'm not originally from Yogyakarta but living here since I spent some years studying in this town and right now I'm working. I used to enjoy writing letters since 5 years ago (yup before pandemic changed everything haha). In Indonesia, we have many local languages and every place has their own culture, I'd be honest that i am not a master to explain about everything because I am also still observing about the difference as far as I can see it in person.