Hi,
I fixed the header.php file to show the favicon.
The theme requires RoadThemes Helpers plugin to show the map and you need to select page template for the contact page is Contact Template http://prntscr.com/bb9h8m
For the tax, please check with a default Theme. The saharan theme don’t change this.
You can translate the “All Categories” in the “header-digital8.php” file. And “You have no items in your shopping cart” in the “woocommerce/cart/mini-cart.php” file of the child theme.
Best regards