Code required to translate the word "Products".
<?php
/*
 * Plugin Name: Easy Digital Downloads - Translate Products
 * Description: Code required to translate the word "Products".
 * Author: Phil Johnston
 * Author URI: https://easydigitaldownloads.com/
 * Version: 1.0
 */

function my_custom_fes_product_constant_plural_uppercase( $products_name ){
	return 'Products'; // Replace this with your languages word for "Products"
}
add_filter( 'fes_product_constant_plural_uppercase', 'my_custom_fes_product_constant_plural_uppercase' );

function my_custom_fes_product_constant_plural_lowercase( $products_name ){
	return 'products'; // Replace this with your languages word for "products"
}
add_filter( 'fes_product_constant_plural_lowercase', 'my_custom_fes_product_constant_plural_lowercase' );

function my_custom_fes_product_constant_singular_uppercase( $products_name ){
	return 'Product'; // Replace this with your languages word for "Product"
}
add_filter( 'fes_product_constant_singular_uppercase', 'my_custom_fes_product_constant_singular_uppercase' );

function my_custom_fes_product_constant_singular_lowercase( $products_name ){
	return 'product'; // Replace this with your languages word for "product"
}
add_filter( 'fes_product_constant_singular_lowercase', 'my_custom_fes_product_constant_singular_lowercase' );
To implement this snippet on your site, create a brand new, empty WordPress plugin and paste the above code inside.