Template translation

Hello,

Before subscribing to WPMU I read that we can ask questions about WordPress in general / non WPMU ? Can I do this here ?

For now I will focus on WPMU products + Divi, but before subscribing to both I bought a template on ThemeForest, named "Organic" https://themeforest.net/item/organic-organic-farm-food-business-wordpress-theme/16183215

It looks good but it's not finished, many bugs etc. and the theme author is really strange. He doesnt really understand what we ask him on the support. It seems he deleted the bad comments but people asked for refund ... however my project with this template is almost finished

I try to figure out most of the details/bug myself, but there is one thing that I think exprimented WP people like you can help me with : translation of the theme

I already know about POedit and .po and .mo files and how it works as I used this to translate many templates already

The problem is :

I created translations from English to French and uploaded the files here :
/wp-content/themes/wp-organic-child/languages/fr_FR.mo
/wp-content/themes/wp-organic-child/languages/fr_FR.po

I had to add this code in my functions.php to make the translations work :
/wp-content/themes/wp-organic-child/functions.php

<?php
if( !function_exists('organic_child_setup') ){

	function organic_child_setup() {
		load_theme_textdomain( 'wp-organic', get_stylesheet_directory() . '/languages' );
	}

	add_action( 'after_setup_theme', 'organic_child_setup' );

}

It worked perfectly ... for a few days
Then a morning I opened the website and everything was back in English.

Theme author tells me :

Sorry for this. It suddenly disappear and I have not any info to find the reason for this. You try to one more time?

http://cmssuperheroes.com/topic/admin-translation/
http://cmssuperheroes.com/topic/translation-losts/

Any help possible to apply my .po/.mo to the website ?

Many thanks in advance
Kind regards