HTML Comments not having the right language

[John Ericson Rodriguez]

• I'm submitting a ...
  [x] language request
  [ ] bug report
  [ ] feature request
  [ ] question about the decisions made in the repository
  [ ] question about how to use this project

• Summary
  Please remove HTML comments in Cantonese: When exported to HTML, the language is not being picked up.

[Fengda Huang]

give a PR ?