diff --git a/.idea/php.xml b/.idea/php.xml
index 3b1bcf5..9a0a9fd 100644
--- a/.idea/php.xml
+++ b/.idea/php.xml
@@ -6,4 +6,9 @@
     </include_path>
   </component>
   <component name="PhpProjectSharedConfiguration" php_language_level="7.4" />
+  <component name="PhpUnit">
+    <phpunit_settings>
+      <PhpUnitSettings custom_loader_path="$PROJECT_DIR$/vendor/autoload.php" />
+    </phpunit_settings>
+  </component>
 </project>
\ No newline at end of file
diff --git a/.idea/wepesi_validation.iml b/.idea/wepesi_validation.iml
index 1ee89a6..40fe797 100644
--- a/.idea/wepesi_validation.iml
+++ b/.idea/wepesi_validation.iml
@@ -3,7 +3,7 @@
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" packagePrefix="Wepesi\app\" />
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" packagePrefix="Wepesi\App\" />
       <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/composer" />
     </content>
diff --git a/composer.json b/composer.json
index 609da5c..7991ca0 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     ],
     "autoload": {
         "psr-4": {
-            "Wepesi\\app\\":"src/"
+            "Wepesi\\App\\":"src/"
         }
     },
     "require": {
diff --git a/lang/fr/language.php b/lang/fr/language.php
index e89a9fd..969db25 100644
--- a/lang/fr/language.php
+++ b/lang/fr/language.php
@@ -1,10 +1,18 @@
 <?php
 $language=[
-    "`%s` should have minimum of `%s` caracters"=>"`%s` doit avoir un minimum de `%s` caracteres",
-    "`%s` should have maximum of `%s` caracters"=>"`%s` doit avoir un maximum de `%s` caracteres",
+    "`%s` should have minimum of `%s` characters"=>"`%s` doit avoir un minimum de `%s` caractèress",
+    "`%s` should have maximum of `%s` characters"=>"`%s` doit avoir un maximum de `%s` caractèress",
     "`%s` this should be an email"=>"`%s` doit etre un email",
     "`%s` this should be a link(url)"=>"`%s` doit avoir un lien(url) ",
     "`%s` should match %s"=>"`%s` doit correpondre a `%s`",
     "`%s` is required"=>"`%s` est obligatoire",
+    "`%s` should be a string"=>"`%s` doit est une chaine de caractères",
+    "`%s` should be greater than `%s`"=>"`%s` devrait être supérieur à `%s`",
+    "`%s` should be less than `%s`"=>"`%s` devrait être inférieur à `%s`",
+    "`%s` should be a positive number"=>"`%s` devrait être un nombre positif",
+    "`%s` should be a number"=>"`%s` devrait être un nombre.",
+    "`%s` is unknow"=>"`%s` n'est pas definit",
+    "`%s` should be a date."=>"`%s` devrait être une date.",
+    "`%s` should be greater than now"=>"`%s` devrait être plus grand que maintenant",
     "`%s` should be a string"=>"`%s` doit est une chaine de caractere",
 ];
\ No newline at end of file
diff --git a/src/VBoolean.php b/src/VBoolean.php
index 9a62c58..270abdd 100644
--- a/src/VBoolean.php
+++ b/src/VBoolean.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Wepesi\app;
+namespace Wepesi\App;
 /*
  * To change this license header, choose License Headers in Project Properties.
  * To change this template file, choose Tools | Templates
diff --git a/src/VDate.php b/src/VDate.php
index a3d8305..db2c576 100644
--- a/src/VDate.php
+++ b/src/VDate.php
@@ -2,21 +2,19 @@
 
 
 namespace Wepesi\App;
-
 /**
- * Description of VNumber
+ * Description of VDate
  *
  * @author Boss Ibrahim Mussa
  */
 class VDate
 {
     private $date_value;
-    private $string_item;
-    private $source_data;
-    private $_errors;
-    private $_min;
-    private $_max;
-//    private $_mois=["Janviers","Fevrier","Mars","Avril","Mai","Juin","Jouillet","Aout","Septenbre","Octobre","Novembre","Decembre"];
+    private ?string $string_item;
+    private array $source_data;
+    private array $_errors=[];
+    private int $_min;
+    private int $_max;
     //put your code here
     function __construct(array $source,string $string_item=null) {
         $this->date_value=$source[$string_item];
@@ -29,14 +27,15 @@ function __construct(array $source,string $string_item=null) {
     /**
      * @return $this
      */
-    function now(){
+    function now(): VDate
+    {
         $min_date_time=strtotime("now");
         $min_date=date("d/F/Y",$min_date_time);
         $date_value_time= strtotime($this->date_value);
         if ($date_value_time < $min_date_time) {
             $message=[
                 "type"=>"date.now",
-                "message"=> "`{$this->string_item}` should be greater than now",
+                "message"=> i18n::translate("`%s` should be greater than now",[$this->string_item]),
                 "label"=>$this->string_item,
                 "limit"=>$min_date
             ];
@@ -50,15 +49,15 @@ function now(){
      * @return $this
      * while trying to get day validation use this module
      */
-    function today(string $times=null){
-        $regeg="#+[0-9]h:[0-9]min:[0-9]sec#";
+    function today(string $times=null): VDate
+    {
         $min_date_time=strtotime("now {$times}");
         $min_date=date("d/F/Y",$min_date_time);
         $date_value_time= strtotime($this->date_value);
         if ($date_value_time > $min_date_time) {
             $message=[
                 "type"=>"date.now",
-                "message"=> "`{$this->string_item}` should be greater than today ",
+                "message"=> i18n::translate("`%s` should be greater than today ",[$this->string_item]),
                 "label"=>$this->string_item,
                 "limit"=>$min_date
             ];
@@ -66,26 +65,28 @@ function today(string $times=null){
         }
         return $this;
     }
+
     /**
-     * @param string $rule_values
+     * @param string|null $rule_values
      * @return $this
      * get the min date control from the given date
      */
-    function min(string $rule_values=null){
+    function min(string $rule_values=null): VDate
+    {
         /**
          * $regex= "#[a-zA-Z]#";
          * $time= preg_match($regex,$rule_values);
          * $con=!$time?$time:(int)$time;
          * in case the parameters are integers
          */
-        $rule_values=isset($rule_values)?$rule_values: "now";
+        $rule_values= $rule_values ?? "now";
         $min_date_time=strtotime($rule_values);
         $min_date=date("d/F/Y",$min_date_time);
         $date_value_time= strtotime($this->date_value);
         if ($date_value_time > $min_date_time) {
             $message=[
                 "type"=>"date.min",
-                "message"=> "`{$this->string_item}` should greater than `{$min_date}`",
+                "message"=> i18n::translate("`%s` should be greater than `%s`",[$this->string_item,$min_date]),
                 "label"=>$this->string_item,
                 "limit"=>$min_date
             ];
@@ -99,16 +100,16 @@ function min(string $rule_values=null){
      * @return $this
      * while try to check maximum date of a defined period use this module
      */
-    function max(string $rule_values=null){
-        $rule_values=isset($rule_values)?$rule_values: "now";
-
+    function max(string $rule_values=null): VDate
+    {
+        $rule_values= $rule_values ?? "now";
         $max_date_time=strtotime($rule_values);
         $max_date=date("d/F/Y",$max_date_time);
         $date_value_time= strtotime($this->date_value);
         if ($max_date_time<$date_value_time) {
             $message = [
                 "type" => "date.max",
-                "message" => "`{$this->string_item}` should be less than `{$max_date}`",
+                "message" => i18n::translate("`%s` should be less than `%s`",[$this->string_item,$max_date]),
                 "label" => $this->string_item,
                 "limit" => $max_date
             ];
@@ -120,12 +121,13 @@ function max(string $rule_values=null){
      * @return $this
      * call this module is the input is requied and should not be null or empty
      */
-    function required(){
+    function required(): VDate
+    {
         $required_value= trim($this->date_value);
         if (empty($required_value) || strlen($required_value)==0) {
             $message = [
                 "type"=> "any.required",
-                "message" => "`{$this->string_item}` {$this->lang->required}",
+                "message" => i18n::translate("`%s` is required",[$this->string_item]),
                 "label" => $this->string_item,
             ];
             $this->addError($message);
@@ -133,29 +135,30 @@ function required(){
         return $this;
     }
 //    private methode
-    private function checkExist(string $itemKey=null){
+    private function checkExist(string $itemKey=null): void
+    {
         $item_to_check=$itemKey?$itemKey:$this->string_item;
         $regex="#[a-zA-Z0-9]#";
         $this->_errors=[];
         if (!isset($this->source_data[$item_to_check])) {
             $message = [
                 "type"=> "any.unknow",
-                "message" => "`{$item_to_check}` {$this->lang->unknow}",
+                "message" => i18n::translate("`%s` is unknow",[$item_to_check]),
                 "label" => $item_to_check,
             ];
             $this->addError($message);
         }else if(!preg_match($regex,$this->source_data[$item_to_check]) || strlen(trim($this->source_data[$item_to_check]))==0){
             $message=[
                 "type" => "date.unknow",
-                "message" => "`{$item_to_check}` {$this->lang->string_unknow}",
+                "message" => i18n::translate("`%s` should be a date.",[$item_to_check]),
                 "label" => $item_to_check,
             ];
             $this->addError($message);
         }
-        return true;
     }
-    private function addError(array $value){
-        return $this->_errors[]=$value;
+    private function addError(array $value): void
+    {
+        $this->_errors[] = $value;
     }
     function check(){
         return  $this->_errors;
diff --git a/src/VNumber.php b/src/VNumber.php
index 6c30f66..d7f1aa7 100644
--- a/src/VNumber.php
+++ b/src/VNumber.php
@@ -6,7 +6,7 @@
  * and open the template in the editor.
  */
 
-namespace Wepesi\app;
+namespace Wepesi\App;
 
 /**
  * Description of VNumber
@@ -16,11 +16,11 @@
 class VNumber {
     //put your code here
     private $string_value;
-    private $string_item;
-    private $source_data;
-    private $_errors;
-    private $_min;
-    private $_max;
+    private string $string_item;
+    private array $source_data;
+    private array $_errors;
+    private int $_min;
+    private int $_max;
     
     function __construct(array $source,string $string_item) {
         $this->source_data=$source;        
@@ -30,11 +30,17 @@ function __construct(array $source,string $string_item) {
             $this->string_value=$source[$string_item];
         }
     }
-    function min(int $min_values){
+
+    /**
+     * @param int $min_values
+     * @return $this
+     */
+    function min(int $min_values): VNumber
+    {
         if ((int) $this->string_value < $min_values) {
             $message=[
                 "type"=>"number.min",
-                "message"=> "`{$this->string_item}` should be greater than  `{$min_values}`",
+                "message"=> i18n::translate("`%s` should be greater than `%s`",[$this->string_item,$min_values]),
                 "label"=>$this->string_item,
                 "limit"=>$min_values
             ];
@@ -42,11 +48,17 @@ function min(int $min_values){
         }
         return $this;
     }
-    function max(int $min_values){
+
+    /**
+     * @param int $min_values
+     * @return $this
+     */
+    function max(int $min_values): VNumber
+    {
         if ((int) $this->string_value > $min_values) {
             $message=[
                 "type"=>"number.max",
-                "message"=> "`{$this->string_item}` should be less than  `{$min_values}`",
+                "message"=> i18n::translate("`%s` should be less than `%s`",[$this->string_item,$min_values]),
                 "label"=>$this->string_item,
                 "limit"=>$min_values
             ];
@@ -54,11 +66,17 @@ function max(int $min_values){
         }
         return $this;
     }
-    function positive(int $min_values){
+
+    /**
+     * @param int $min_values
+     * @return $this
+     */
+    function positive(int $min_values): VNumber
+    {
         if ((int) $this->string_value < 0) {
             $message=[
                 "type"=>"number.positive",
-                "message"=> "`{$this->string_item}` should be a positive number",
+                "message"=> i18n::translate("`%s` should be a positive number",[$this->string_item]),
                 "label"=>$this->string_item,
                 "limit"=>1
             ];
@@ -66,27 +84,37 @@ function positive(int $min_values){
         }
         return $this;
     }
-    function required(){
+
+    /**
+     * @return $this
+     */
+    function required(): VNumber
+    {
         $required_value= trim($this->string_value);
         if (empty($required_value)) {
             $message = [
                 "type"=> "any.required",
-                "message" => "`{$this->string_item}` is required",
+                "message" => i18n::translate("`%s` is required",[$this->string_item]),
                 "label" => $this->string_item,
             ];
             $this->addError($message);
         }
         return $this;
     }
-//    
-    private function checkExist(string $itemKey=null){
-        $item_to_check=$itemKey?$itemKey:$this->string_item;
+
+    /**
+     * @param string|null $itemKey
+     * @return bool
+     */
+    private function checkExist(string $itemKey=null): bool
+    {
+        $item_to_check=!$itemKey?$this->string_item:$itemKey;
         $regex_string="#[a-zA-Z]#";
         $status_key_exist=true;
         if (!isset($this->source_data[$item_to_check])) {
             $message = [
                 "type"=> "any.unknow",
-                "message" => "`{$item_to_check}` is unknow",
+                "message" => i18n::translate("`%s` is unknow",[$item_to_check]),
                 "label" => $item_to_check,
             ];
             $this->addError($message);
@@ -94,7 +122,7 @@ private function checkExist(string $itemKey=null){
         }else if (preg_match($regex_string,trim($this->source_data[$item_to_check])) || !is_integer($this->source_data[$item_to_check])) {            
             $message = [
                 "type"=> "number.unknow",
-                "message" => "`{$item_to_check}` should be a number",
+                "message" => i18n::translate("`%s` should be a number",[$item_to_check]),
                 "label" => $item_to_check,
             ];
             $this->addError($message);
@@ -102,10 +130,20 @@ private function checkExist(string $itemKey=null){
         }
         return $status_key_exist;
     }
-    private function addError(array $value){
-       return $this->_errors[]=$value;
+
+    /**
+     * @param array $value
+     */
+    private function addError(array $value): void
+    {
+        $this->_errors[] = $value;
     }
-    function check(){
+
+    /**
+     * @return array
+     */
+    function check(): array
+    {
         return  $this->_errors;
     }
 }
diff --git a/src/VString.php b/src/VString.php
index ec0d62c..594499c 100644
--- a/src/VString.php
+++ b/src/VString.php
@@ -1,5 +1,5 @@
 <?php
-namespace Wepesi\app;
+namespace Wepesi\App;
 /*
  * To change this license header, choose License Headers in Project Properties.
  * To change this template file, choose Tools | Templates
@@ -13,16 +13,16 @@
  */
 class VString {
     private $string_value;
-    private $string_item;
-    private $source_data;
-    private $_errors;
-    private $_min;
-    private $_max;
+    private ?string $string_item;
+    private array $source_data=[];
+    private array $_errors=[];
+    private int $_min=0;
+    private int $_max=0;
+
     /**
-     * 
+     *
      * @param array $source
-     * @param string $string_item
-     * @param string $stringValue
+     * @param string|null $string_item
      */
     function __construct(array $source,string $string_item=null) {
         $this->string_item=$string_item;
@@ -38,12 +38,13 @@ function __construct(array $source,string $string_item=null) {
      * @param int $rule_values
      * @return $this
      */
-    function min(int $rule_values=0){
+    function min(int $rule_values=0): VString
+    {
         $min=is_integer($rule_values)? ((int)$rule_values>0?(int)$rule_values:0):0;
         if (strlen($this->string_value) < $min) {
             $message=[
                 "type"=>"string.min",
-                "message"=> i18n::translate("`%s` should have minimum of `%s` caracters",[$this->string_item,$min]),
+                "message"=> i18n::translate("`%s` should have minimum of `%s` characters",[$this->string_item,$min]),
                 "label"=>$this->string_item,
                 "limit"=>$min
             ];
@@ -56,13 +57,14 @@ function min(int $rule_values=0){
      * @param int $rule_values
      * @return $this
      */
-    function max(int $rule_values=1){
+    function max(int $rule_values=1): VString
+    {
         $max = is_integer($rule_values) ? ((int)$rule_values > 0 ? (int)$rule_values : 0):0;
         $this->_max=$max; 
         if (strlen($this->string_value) > $max) {
             $message = [
                 "type" => "string.max",
-                "message" => i18n::translate("`%s` should have maximum of `%s` caracters",[$this->string_item,$max]),
+                "message" => i18n::translate("`%s` should have maximum of `%s` characters",[$this->string_item,$max]),
                 "label" => $this->string_item,
                 "limit" => $max
             ];
@@ -74,7 +76,8 @@ function max(int $rule_values=1){
      * 
      * @return $this
      */
-    function email(){
+    function email(): VString
+    {
         if (!filter_var($this->string_value, FILTER_VALIDATE_EMAIL)) {
             $message = [
                 "type" => "string.email",
@@ -89,7 +92,8 @@ function email(){
      * 
      * @return $this
      */
-    function url(){
+    function url(): VString
+    {
         if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i", $this->string_value)) {
             $message = [
                 "type" => "string.url",
@@ -117,7 +121,12 @@ function match(string $key_tomatch){
         }
         return $this;
     }
-    function required(){
+
+    /**
+     * @return $this
+     */
+    function required(): VString
+    {
         $required_value= trim($this->string_value);
         if (empty($required_value)) {
             $message = [
@@ -141,7 +150,7 @@ private function checkExist(string $itemKey=null){
         if (!isset($this->source_data[$item_to_check])) {
             $message = [
                 "type"=> "any.unknow",
-                "message" => "`{$item_to_check}` is unknow",
+                "message" => i18n::translate("`%s` is unknow",[$item_to_check]),
                 "label" => $item_to_check,
             ];
             $this->addError($message);
@@ -159,10 +168,11 @@ private function checkExist(string $itemKey=null){
     }/**
      * 
      * @param array $value
-     * @return type
-     */
-    private function addError(array $value){
-       return $this->_errors[]=$value;
+     * @return void
+ */
+    private function addError(array $value): void
+    {
+        $this->_errors[] = $value;
     }/**
      * 
      * @return type
diff --git a/src/Validate.php b/src/Validate.php
index c9f7f0d..6a18266 100644
--- a/src/Validate.php
+++ b/src/Validate.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Wepesi\app;
+namespace Wepesi\App;
 /**
  * Description of validate
  *
diff --git a/src/i18n.php b/src/i18n.php
new file mode 100644
index 0000000..381d150
--- /dev/null
+++ b/src/i18n.php
@@ -0,0 +1,21 @@
+<?php
+
+
+namespace Wepesi\App;
+
+class i18n
+{
+    static function translate(string $message,array $data=[]):string{
+        $file="./lang/".LANG."/language.php";
+        if(!is_file($file) && !file_exists($file)){
+            $file="./lang/en/language.php";
+        }
+        include($file);
+        $message_key=$message;
+        if(count($data)>0){
+            $key_value=!isset($language[$message])?null:$language[$message];
+            $message_key=$key_value!=null?vsprintf($key_value,$data):vsprintf($message,$data);
+        }
+        return  $message_key;
+    }
+}
\ No newline at end of file
diff --git a/test/date.php b/test/date.php
index 2408fb6..6257c77 100644
--- a/test/date.php
+++ b/test/date.php
@@ -1,7 +1,7 @@
 <?php
     $schema=[
         "birth_day"=>$valid->date("birth_day")->min("-18years")->required()->check(),
-        "date_created"=>$valid->date("birth_day")->now()->required()->check()
+        "date_created"=>$valid->date("birth_day")->now()->max("100years")->required()->check()
     ];
     $valid->check($source,$schema);
 
diff --git a/test/index.php b/test/index.php
index aaa4e86..a1a3990 100644
--- a/test/index.php
+++ b/test/index.php
@@ -1,5 +1,5 @@
 <?php
-    use Wepesi\app\Validate;
+    use Wepesi\App\Validate;
 //
     $source = [
         "name" => "",
diff --git a/test/number.php b/test/number.php
index f264145..4137f99 100644
--- a/test/number.php
+++ b/test/number.php
@@ -1,7 +1,7 @@
 <?php
-$check=[
+$schema=[
     "age"=>$valid->number("age")->min(18)->max(50)->required()->check()
     ];
-    $valid->check($source,$check);
+    $valid->check($source,$schema);
 var_dump($valid->passed());
 var_dump($valid->errors());
\ No newline at end of file