When using the weight shipping plugin, the invoice is automatically showing the geozone (eg. Canada). This is not clear that this a shipping fee. And this is impossible to modify that part of the invoice.
Would it be possible to replace that by something like "Shipping (Canada)" or just "Shipping"?
If you want to have this, then it requires to customize to EShop Weight shipping plugin. Please submit a new ticket to EShop category to send me the super admin account to your site so I can help you with that.