Revert "Revert "Language names via intl library.""

This reverts commit 4f35efa0ba.

library/intl/src/Currency/CurrencyInterface.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace CommerceGuys\Intl\Currency;
+
+interface CurrencyInterface
+{
+    /**
+     * Gets the alphabetic currency code.
+     *
+     * @return string
+     */
+    public function getCurrencyCode();
+
+    /**
+     * Sets the alphabetic currency code.
+     *
+     * @param string $currencyCode The alphabetic currency code.
+     */
+    public function setCurrencyCode($currencyCode);
+
+    /**
+     * Gets the currency name.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Sets the currency name.
+     *
+     * @param string $name The currency name.
+     */
+    public function setName($name);
+
+    /**
+     * Gets the numeric currency code.
+     *
+     * The numeric code has three digits, and the first one can be a zero,
+     * hence the need to pass it around as a string.
+     *
+     * @return string
+     */
+    public function getNumericCode();
+
+    /**
+     * Sets the numeric currency code.
+     *
+     * @param string $numericCode The numeric currency code.
+     */
+    public function setNumericCode($numericCode);
+
+    /**
+     * Gets the currency symbol.
+     *
+     * @return string
+     */
+    public function getSymbol();
+
+    /**
+     * Sets the currency symbol.
+     *
+     * @param string $symbol The currency symbol.
+     */
+    public function setSymbol($symbol);
+
+    /**
+     * Gets the number of fraction digits.
+     *
+     * Used when rounding or formatting an amount for display.
+     * Actual storage precision can be greater.
+     *
+     * @return int
+     */
+    public function getFractionDigits();
+
+    /**
+     * Sets the number of fraction digits.
+     *
+     * @param int $fractionDigits The number of fraction digits.
+     */
+    public function setFractionDigits($fractionDigits);
+}