Translation questions/problems

Hi !
I’ve just purchase this nice thème, and wanted to translate it into french, using first an addon called “loco translate”, and did not work – “Error: Invalid MO format”.

So, i’ve runned the default.po with poedit, translated stuffs in french and injected it into the the folder wp-content/themes/blackfyre/langs… but nothing change.

Should i do something in particular ?

Thanks a lot 🙂