Translation of some strings of Multi Vendor plugin

Many users complain that they do not find some backend strings in files .po / .pot of the plugin. Actually these strings do not come from our plugin, but are strings of WooCommerce and thus need to be translated from the .po files WooCommerce.

Note: WooCommerce does not have a folder languages in his plugin but uses the default wp languages folder that is located in wp-content / languages / plugins.
The files are to be modified or added to that folder, according to the usual convention.
For example, all strings inherent reporting, are those of WooCommerce plugin.