Our local users should have locale zh_TW.UTF-8, and in the Data - Sort - Options - Language the default value is Traditional Chinese. In the help document you mentioned it explained a bit about the different behavior in Asian language. Thank you.
However, even if I set the language to English(US), the result is still the same (not following ASCII). Even if I open Calc with locale en_US.UTF-8, the result is still the same too.
I tried opening it under en_US.UTF-8 locale and English language environment (i.e., no “Asian” language issue affecting), and still got the same result (first , second ; third . fourth /). How does the result come from? It’s not explained in the help document.