We usually substitute with a different sounding character which results in a non-sensible string of characters, yet still understandable (to native speakers at

We usually substitute with a different sounding character which results in a non-sensible string of characters, yet still understandable (to native speakers at least) given sufficient context. As an example, we often joke about how the staff of a certain local noodle soup chain often speak in heavily accented Cantonese by writing their speech as "勿演", "懶肉", "生小辣" ("don't act", "lazy meat", "raw little spicy") instead of the correct "墨丸", "腩肉", "三小辣" ("cuttlefish balls", "pork belly", "3rd little spicy").