Added zh-Hant-HK – Chinese (Traditional, Hong Kong), as requested by @zhgchgli0718
Added several additional languages
Also includes these changes:
Changed "Australian", "Canadian", and "Indian" to "Australia", "Canada", and "India", to be consistent with other country names in the languages list (for example, Mexico, Brazil, and Hong Kong)
Made capitalization of language codes consistent with how Apple capitalizes language codes (also to align with BCP 47 standard recommendations)
Closes issue #22:
Also includes these changes: