public function get_coupon_error( $err_code ) {
		switch ( $err_code ) {
			case self::E_WC_COUPON_INVALID_FILTERED:
				$err = __( 'Coupon is not valid.', 'woocommerce' );
				break;
			case self::E_WC_COUPON_NOT_EXIST:
				/* translators: %s: coupon code */
				$err = sprintf( __( 'Coupon "%s" does not exist!', 'woocommerce' ), esc_html( $this->get_code() ) );
				break;
			case self::E_WC_COUPON_INVALID_REMOVED:
				/* translators: %s: coupon code */
				$err = sprintf( __( 'Sorry, it seems the coupon "%s" is invalid - it has now been removed from your order.', 'woocommerce' ), esc_html( $this->get_code() ) );
				break;
			case self::E_WC_COUPON_NOT_YOURS_REMOVED:
				/* translators: %s: coupon code */
				$err = sprintf( __( 'Sorry, it seems the coupon "%s" is not yours - it has now been removed from your order.', 'woocommerce' ), esc_html( $this->get_code() ) );
				break;
			case self::E_WC_COUPON_ALREADY_APPLIED:
				$err = __( 'Coupon code already applied!', 'woocommerce' );
				break;
			case self::E_WC_COUPON_ALREADY_APPLIED_INDIV_USE_ONLY:
				/* translators: %s: coupon code */
				$err = sprintf( __( 'Sorry, coupon "%s" has already been applied and cannot be used in conjunction with other coupons.', 'woocommerce' ), esc_html( $this->get_code() ) );
				break;
			case self::E_WC_COUPON_USAGE_LIMIT_REACHED:
				$err = __( 'Coupon usage limit has been reached.', 'woocommerce' );
				break;
			case self::E_WC_COUPON_EXPIRED:
				$err = __( 'This coupon has expired.', 'woocommerce' );
				break;
			case self::E_WC_COUPON_MIN_SPEND_LIMIT_NOT_MET:
				/* translators: %s: coupon minimum amount */
				$err = sprintf( __( 'The minimum spend for this coupon is %s.', 'woocommerce' ), wc_price( $this->get_minimum_amount() ) );
				break;
			case self::E_WC_COUPON_MAX_SPEND_LIMIT_MET:
				/* translators: %s: coupon maximum amount */
				$err = sprintf( __( 'The maximum spend for this coupon is %s.', 'woocommerce' ), wc_price( $this->get_maximum_amount() ) );
				break;
			case self::E_WC_COUPON_NOT_APPLICABLE:
				$err = __( 'Sorry, this coupon is not applicable to your cart contents.', 'woocommerce' );
				break;
			case self::E_WC_COUPON_EXCLUDED_PRODUCTS:
				// Store excluded products that are in cart in $products.
				$products = array();
				if ( ! WC()->cart->is_empty() ) {
					foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
						if ( in_array( intval( $cart_item['product_id'] ), $this->get_excluded_product_ids(), true ) || in_array( intval( $cart_item['variation_id'] ), $this->get_excluded_product_ids(), true ) || in_array( intval( $cart_item['data']->get_parent_id() ), $this->get_excluded_product_ids(), true ) ) {
							$products[] = $cart_item['data']->get_name();
						}
					}
				}

				/* translators: %s: products list */
				$err = sprintf( __( 'Sorry, this coupon is not applicable to the products: %s.', 'woocommerce' ), implode( ', ', $products ) );
				break;
			case self::E_WC_COUPON_EXCLUDED_CATEGORIES:
				// Store excluded categories that are in cart in $categories.
				$categories = array();
				if ( ! WC()->cart->is_empty() ) {
					foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
						$product_cats = wc_get_product_cat_ids( $cart_item['product_id'] );
						$intersect    = array_intersect( $product_cats, $this->get_excluded_product_categories() );

						if ( count( $intersect ) > 0 ) {
							foreach ( $intersect as $cat_id ) {
								$cat          = get_term( $cat_id, 'product_cat' );
								$categories[] = $cat->name;
							}
						}
					}
				}

				/* translators: %s: categories list */
				$err = sprintf( __( 'Sorry, this coupon is not applicable to the categories: %s.', 'woocommerce' ), implode( ', ', array_unique( $categories ) ) );
				break;
			case self::E_WC_COUPON_NOT_VALID_SALE_ITEMS:
				$err = __( 'Sorry, this coupon is not valid for sale items.', 'woocommerce' );
				break;
			default:
				$err = '';
				break;
		}
		return apply_filters( 'woocommerce_coupon_error', $err, $err_code, $this );
	}