Unable to see additional languages option in app bots

I am unable to add any additional languages to my bot, I can find only the default languages option, so how can I add additional languages here?

CC : @Manasvi @hemalatha_maddela

It should be found here if your tier allows additional languages.
Please check internally about your tier.

cc: @suryaraman

Yes, check for the languages that can be added in the dropdown.