diff --git a/core/lib/Thelia/Core/HttpFoundation/Session/Session.php b/core/lib/Thelia/Core/HttpFoundation/Session/Session.php
index 008f0fbfb..dbfe0d204 100644
--- a/core/lib/Thelia/Core/HttpFoundation/Session/Session.php
+++ b/core/lib/Thelia/Core/HttpFoundation/Session/Session.php
@@ -270,6 +270,6 @@ class Session extends BaseSession
      */
     public function getConsumedCoupons()
     {
-        return $this->get('thelia.consumed_coupons');
+        return $this->get('thelia.consumed_coupons', array());
     }
 }
diff --git a/core/lib/Thelia/Core/Template/Element/BaseLoop.php b/core/lib/Thelia/Core/Template/Element/BaseLoop.php
index 1038541de..bb88f5468 100644
--- a/core/lib/Thelia/Core/Template/Element/BaseLoop.php
+++ b/core/lib/Thelia/Core/Template/Element/BaseLoop.php
@@ -33,7 +33,7 @@ use Thelia\Type\TypeCollection;
 abstract class BaseLoop
 {
     /**
-     * @var \Symfony\Component\HttpFoundation\Request
+     * @var \Thelia\Core\HttpFoundation\Request
      */
     protected $request;
 
diff --git a/core/lib/Thelia/Core/Template/Loop/Coupon.php b/core/lib/Thelia/Core/Template/Loop/Coupon.php
index d1d26c905..145202120 100644
--- a/core/lib/Thelia/Core/Template/Loop/Coupon.php
+++ b/core/lib/Thelia/Core/Template/Loop/Coupon.php
@@ -49,6 +49,7 @@ class Coupon extends BaseI18nLoop implements PropelSearchLoopInterface
         return new ArgumentCollection(
             Argument::createIntListTypeArgument('id'),
             Argument::createBooleanOrBothTypeArgument('is_enabled'),
+            Argument::createBooleanTypeArgument('in_use'),
             new Argument(
                 'order',
                 new TypeCollection(
@@ -86,6 +87,18 @@ class Coupon extends BaseI18nLoop implements PropelSearchLoopInterface
             $search->filterByIsEnabled($isEnabled ? true : false);
         }
 
+        $inUse = $this->getInUse();
+
+        if ($inUse !== null) {
+            // Get the code of coupons currently in use
+            $consumedCoupons = $this->request->getSession()->getConsumedCoupons();
+
+            // Get only matching coupons.
+            $criteria = $inUse ? Criteria::IN : Criteria::NOT_IN;
+
+            $search->filterByCode($consumedCoupons, $criteria);
+        }
+
         $search->addAsColumn('days_left', 'DATEDIFF('.CouponTableMap::EXPIRATION_DATE.', CURDATE()) - 1');
 
         $orders = $this->getOrder();
@@ -202,6 +215,12 @@ class Coupon extends BaseI18nLoop implements PropelSearchLoopInterface
                 $freeShippingForModulesIds[] = $couponModule->getModuleId();
             }
 
+            // If and only if the coupon is currently in use, get the coupon discount. Calling exec() on a coupon
+            // which is not currently in use may apply coupon on the cart. This is true for coupons such as FreeProduct,
+            // which adds a product to the cart.
+            $discount = $couponManager->isInUse() ? $couponManager->exec() : 0;
+
+
             $loopResultRow
                 ->set("ID", $coupon->getId())
                 ->set("IS_TRANSLATED", $coupon->getVirtualColumn('IS_TRANSLATED'))
@@ -224,6 +243,7 @@ class Coupon extends BaseI18nLoop implements PropelSearchLoopInterface
                 ->set("SERVICE_ID", $couponManager->getServiceId())
                 ->set("FREE_SHIPPING_FOR_COUNTRIES_LIST", implode(',', $freeShippingForCountriesIds))
                 ->set("FREE_SHIPPING_FOR_MODULES_LIST", implode(',', $freeShippingForModulesIds))
+                ->set("DISCOUNT_AMOUNT", $discount)
             ;
 
             $loopResult->addRow($loopResultRow);
diff --git a/core/lib/Thelia/Coupon/Type/CouponAbstract.php b/core/lib/Thelia/Coupon/Type/CouponAbstract.php
index 9766b7fbe..a0bdf2db1 100644
--- a/core/lib/Thelia/Coupon/Type/CouponAbstract.php
+++ b/core/lib/Thelia/Coupon/Type/CouponAbstract.php
@@ -183,6 +183,7 @@ abstract class CouponAbstract implements CouponInterface
 
     /**
      * @param true $perCustomerUsageCount
+     * @return $this
      */
     public function setPerCustomerUsageCount($perCustomerUsageCount)
     {
@@ -425,14 +426,14 @@ abstract class CouponAbstract implements CouponInterface
      * This methods checks a field value. If the field has a correct value, this value is returned
      * Otherwise, an InvalidArgumentException describing the problem should be thrown.
      *
-     * This method should be ovveriden to be useful.
+     * This method should be overriden to be useful.
      *
-     * @param $fieldName
-     * @param $fieldValue
+     * @param string $fieldName
+     * @param string $fieldValue
      * @return mixed
-     * @throws \InvalidArgumentException if the field valiue is not valid.
+     * @throws \InvalidArgumentException if the field value is not valid.
      */
-    protected function checkCouponFieldValue($fieldName, $fieldValue)
+    protected function checkCouponFieldValue(/** @noinspection PhpUnusedParameterInspection */ $fieldName, $fieldValue)
     {
         return $fieldValue;
     }
@@ -507,4 +508,11 @@ abstract class CouponAbstract implements CouponInterface
     {
         // Does nothing. Override this function as needed.
     }
+
+    public function isInUse() {
+        return in_array(
+            $this->code,
+            $this->facade->getRequest()->getSession()->getConsumedCoupons()
+        );
+    }
 }
diff --git a/core/lib/Thelia/Coupon/Type/CouponInterface.php b/core/lib/Thelia/Coupon/Type/CouponInterface.php
index d8190f3d7..cfd645d28 100644
--- a/core/lib/Thelia/Coupon/Type/CouponInterface.php
+++ b/core/lib/Thelia/Coupon/Type/CouponInterface.php
@@ -192,15 +192,15 @@ interface CouponInterface
     public function isExpired();
 
     /**
-     * Return effects generated by the coupon
-     * A positive value
+     * Return an amount thant will be subtracted to the cart total, or zero.
      *
-     * Effects could also affect something else than the final Checkout price
-     * FacadeInterface $facade could be used to directly pass a Session value
-     * some would wish to modify
-     * Hence affecting a wide variety of Thelia elements
+     * This method could also perform something else than the calculating an amount to subtract from the cart. It may
+     * add a product to the cart, for example. In this case, an amount of 0 will be returned.
      *
-     * @return float Amount removed from the Total Checkout
+     * WARNING: this method could be called several times, so perform suitable checks before performing cart
+     * manipulations, so that the coupon effect will not be applied several times.
+     *
+     * @return float Amount removed from the cart total
      */
     public function exec();
 
@@ -244,4 +244,8 @@ interface CouponInterface
      */
     public function clear();
 
+    /**
+     * @return bool true if the coupon is currently in use in the current order process, false otherwise
+     */
+    public function isInUse();
 }
diff --git a/templates/backOffice/default/languages.html b/templates/backOffice/default/languages.html
index 9678fbfe4..d5a3ec367 100644
--- a/templates/backOffice/default/languages.html
+++ b/templates/backOffice/default/languages.html
@@ -48,6 +48,7 @@
                             </caption>
                             <thead>
                                 <tr>
+                                    <th>{intl l="ID"}</th>
                                     <th colspan="2">{intl l="Language name"}</th>
                                     <th>{intl l="ISO 639 Code"}</th>
                                     <th>{intl l="Locale"}</th>
@@ -58,6 +59,7 @@
                             <tbody>
                                 {loop type="lang" name="lang.list" backend_context="1"}
                                 <tr>
+                                    <td>{$ID}</td>
                                     <td class="text-center"><img src="{image file="assets/img/flags/{$CODE}.png"}" alt="{$CODE}" /></td>
                                     <td>{$TITLE}</td>
                                     <td>{$CODE}</td>