edu-clean Theme Language files

Dear Sirs,

I am trying to translate the edu-clean theme and having no actual result.
Located the default.po file on theme's language folder.
Openned it and used poedit to generate new and
Copied the new files to the language folder. No result.

Can you please give me some advice on:
1) My wp-config defines pt_BR as the languae. Is there any additional config to change the language?
2) Shall the localized files have any prefix?

Thanks in advance,