Ming explains that speech milestones vary by language and culture, not universal across all children. Cantonese-speaking kids acquire the /s/ sound earlier because it appears more often in their language. Many countries lack their own milestone standards, so applying Western norms globally can be misleading.
Chapters
Cultural and country differences that milestones in general, how much a child should talk, use language and so on. So for example, the S sound of the speech milestone in Western countries permissible to acquire that sound later, right? Whereas for Asian people, for, for instance in Hong Kong we speak Cantonese, the S sound is a lot more frequent, meaning there are a lot more words that require the S sound. The S sound by itself is used in single syllable words a lot more. Therefore it's easier to acquire for the S sound to acquire earlier for Chinese kids is a lot more likely than Western children, right? It's a simple fact that the S sound is used more frequently. That's a cultural difference and the language difference. I need to put that onto you first because a lot of countries around the world, for instance Indonesia, Malaysia, Southeast Asian countries, these places, they really do not have their own standards just yet. So you need to have that grain of salt. You have to be careful about that, all right?