Can't find options for Mandarin and Cantonese in "Title display language"

Mandarin and Cantonese are two dialects of Chinese characters, we can find them in AKA page (like this).

We can set "Title display language" on "Content Settings", but I can't find options for Mandarin and Cantonese. This issue caused the entry titles to not display properly in Mandarin and Cantonese.

Hope to add these two languages to "Title display language" list, or provide other solutions.