To delete a language in the marketplace,
Go to Admin-> Site Setup
In the General settings, select “Language Management.”
3. Click the delete button in the language management list screen.
4. It displays the delete confirmation popup. Upon confirming, you can delete the language.
Notes:
You cannot delete the default language.
You can’t delete your language if any of the users have used that language as “Email Language.”
Also, you can only delete the default language if you set another language as a default language.
You can delete/edit the language only in the trial period. After that, you can edit or delete the language when you approach language management as an Enterprise user.