diff --git a/ConstraintValidator.php b/ConstraintValidator.php
index 458351fe2..db0ccb60a 100644
--- a/ConstraintValidator.php
+++ b/ConstraintValidator.php
@@ -21,8 +21,8 @@
 abstract class ConstraintValidator implements ConstraintValidatorInterface
 {
     /**
-     * Whether to format {@link \DateTime} objects as RFC-3339 dates
-     * ("Y-m-d H:i:s").
+     * Whether to format {@link \DateTime} objects, either with the {@link \IntlDateFormatter}
+     * (if it is available) or as RFC-3339 dates ("Y-m-d H:i:s").
      */
     const PRETTY_DATE = 1;
 
@@ -69,7 +69,8 @@ protected function formatTypeOf($value)
      * in double quotes ("). Objects, arrays and resources are formatted as
      * "object", "array" and "resource". If the $format bitmask contains
      * the PRETTY_DATE bit, then {@link \DateTime} objects will be formatted
-     * as RFC-3339 dates ("Y-m-d H:i:s").
+     * with the {@link \IntlDateFormatter}. If it is not available, they will be
+     * formatted as RFC-3339 dates ("Y-m-d H:i:s").
      *
      * Be careful when passing message parameters to a constraint violation
      * that (may) contain objects, arrays or resources. These parameters
diff --git a/Resources/translations/validators.de.xlf b/Resources/translations/validators.de.xlf
index 0702e8dfc..a546b86c7 100644
--- a/Resources/translations/validators.de.xlf
+++ b/Resources/translations/validators.de.xlf
@@ -370,6 +370,10 @@
                 <source>This value is not a valid hostname.</source>
                 <target>Dieser Wert ist kein gültiger Hostname.</target>
             </trans-unit>
+            <trans-unit id="96">
+                <source>The number of elements in this collection should be a multiple of {{ compared_value }}.</source>
+                <target>Die Anzahl an Elementen in dieser Sammlung sollte ein Vielfaches von {{ compared_value }} sein.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>
diff --git a/Resources/translations/validators.vi.xlf b/Resources/translations/validators.vi.xlf
index 95dd7d666..ead79d2cd 100644
--- a/Resources/translations/validators.vi.xlf
+++ b/Resources/translations/validators.vi.xlf
@@ -362,6 +362,18 @@
                 <source>This password has been leaked in a data breach, it must not be used. Please use another password.</source>
                 <target>Mật khẩu này đã bị rò rỉ dữ liệu, không được sử dụng nữa. Xin vui lòng sử dụng mật khẩu khác.</target>
            </trans-unit>
+           <trans-unit id="94">
+               <source>This value should be between {{ min }} and {{ max }}.</source>
+               <target>Giá trị này nên thuộc giữa {{ min }} và {{ max }}.</target>
+           </trans-unit>
+           <trans-unit id="95">
+               <source>This value is not a valid hostname.</source>
+               <target>Giá trị này không phải là tên máy chủ hợp lệ.</target>
+           </trans-unit>
+           <trans-unit id="96">
+               <source>The number of elements in this collection should be a multiple of {{ compared_value }}.</source>
+               <target>Số lượng các phần tử trong bộ sưu tập này nên là bội số của {{compared_value}}.</target>
+           </trans-unit>
         </body>
     </file>
 </xliff>