To those wanting to filter the chapter language to show a particular language (say, English, or Vietnamese, or whatever):
1) Click on your profile picture.
2) A dropdown menu is shown. This dropdown menu is scroll-able. Depending on your screen zoom ratio, the lower section of the menu can be hidden and you need to scroll down.
3) Find and click on Chapter Languages.
4) Tick on the language(s) you want and return to the earlier dropdown menu when done.
5) Now you can see chapter list of only your desired language(s). No longer see clutters of chapters in many languages.