How to add new Language into Jitsi Meet language selection dropdown?

I am using self-hosted environment, with Jitsi Meet version 6826.
I am trying to add new translation to the Jitsi Meet Language dropdown in the Setting.
However, even after I rebuild and clear cache, I still dont see the language being displayed.
I have also referred to this https://community.jitsi.org/t/thai-language/91361 but still no luck.

Here are the steps that I did:

  1. from the source, under lang directory, duplicate languages-enGB.json to languages-ta.json, then add new language to languages-ta.json
  2. from the source, under lang directory, duplicate main-enGB.json to main-ta.json.
  3. from the source, under lang directory, add new language to languages.json, and all language-xx.json.
  4. from the source, under react/features/base/il8n directory, add new language into BuiltinLanguages.native.js
  5. at the source directory, run command npm install
  6. at the source directory, run command make
  7. copy the entire directory to my web directory
  8. clear browser cache.

But I still dont see the new language I have added.

Issue solved.
Silly me referring to the wrong directory.