Translate Backend

Hello, how are you? I am unable to translate the backend. I did the steps you suggested above but nothing happens. Where can I be wrong?

Language:
pt_BR
(Brazilian Portuguese)

File name:
booking-for-woocommerce-js-pt_BR-mvvwb-admin.json

I tried these folders:
/wp-content/languages/
/wp-content/languages/plugins

Example of editing the file:
https://docs.google.com/document/d/1ed5awNeSXffNGDgsOTYONYG0K48nfz3GiwOLj8BGvHs/edit?usp=sharing