diff --git a/src/LangManager.php b/src/LangManager.php
index 846f1bf..0324b53 100644
--- a/src/LangManager.php
+++ b/src/LangManager.php
@@ -37,6 +37,9 @@ class LangManager
             'validation.in_rule' => "Le champ :attribute doit être l'une des valeurs suivantes :values.",
             'validation.confirmed_rule' => "Le champ :attribute doit être confirmé par le champ :confirmedAttribute.",
             'validation.active_url' => "Le champ :attribute doit être une URL active.",
+            'validation.lowercase_rule' => "Le champ :attribute doit être en minuscules.",
+            'validation.uppercase_rule' => "Le champ :attribute doit être en majuscules.",
+            'validation.file_rule' => "Le champ :attribute doit être un fichier.",
         ],
         'en' => [
             // English translations
@@ -56,9 +59,12 @@ class LangManager
             'validation.in_rule' => "The :attribute field must be one of the following values: :values.",
             'validation.confirmed_rule' => "The :attribute field must be confirmed by the :confirmedAttribute field.",
             'validation.active_url' => "The :attribute field must be an active URL.",
+            'validation.lowercase_rule' => "The :attribute field must be lowercase.",
+            'validation.uppercase_rule' => "The :attribute field must be uppercase.",
+            'validation.file_rule' => "The :attribute field must be a file.",
         ],
     ];
-    
+
 
     /**
      * Get the current language.
diff --git a/src/Rules/FileRule.php b/src/Rules/FileRule.php
new file mode 100644
index 0000000..1989873
--- /dev/null
+++ b/src/Rules/FileRule.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * FileRule - A validation rule implementation for checking if a field's value is a valid file.
+ *
+ * @package BlakvGhost\PHPValidator\Rules
+ * @author Kabirou ALASSANE
+ * @website https://kabirou-alassane.com
+ * @github https://github.com/BlakvGhost
+ */
+
+namespace BlakvGhost\PHPValidator\Rules;
+
+use BlakvGhost\PHPValidator\LangManager;
+
+class FileRule implements RuleInterface
+{
+    /**
+     * The name of the field being validated.
+     *
+     * @var string
+     */
+    protected $field;
+
+    /**
+     * Constructor of the FileRule class.
+     *
+     * @param array $parameters Parameters for the rule (not used in this rule).
+     */
+    public function __construct(protected array $parameters)
+    {
+        // No specific logic needed in the constructor for this rule.
+    }
+
+    /**
+     * Check if the field's value is a valid file.
+     *
+     * @param string $field The name of the field being validated.
+     * @param mixed $value The value of the field being validated.
+     * @param array $data All validation data.
+     * @return bool True if the value is a valid file, false otherwise.
+     */
+    public function passes(string $field, $value, array $data): bool
+    {
+        // Set the field property for use in the message method.
+        $this->field = $field;
+
+        // Check if the value is a valid file.
+        return is_file($value);
+    }
+
+    /**
+     * Get the validation error message for the file rule.
+     *
+     * @return string Validation error message.
+     */
+    public function message(): string
+    {
+        // Use LangManager to get a translated validation error message.
+        return LangManager::getTranslation('validation.file_rule', [
+            'attribute' => $this->field,
+        ]);
+    }
+}
diff --git a/src/Rules/LowerRule.php b/src/Rules/LowerRule.php
new file mode 100644
index 0000000..af9034d
--- /dev/null
+++ b/src/Rules/LowerRule.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * LowercaseRule - A validation rule implementation for checking if a field's value is lowercase.
+ *
+ * @package BlakvGhost\PHPValidator\Rules
+ * @author Kabirou ALASSANE
+ * @website https://kabirou-alassane.com
+ * @github https://github.com/BlakvGhost
+ */
+
+namespace BlakvGhost\PHPValidator\Rules;
+
+use BlakvGhost\PHPValidator\LangManager;
+
+class LowerRule implements RuleInterface
+{
+    /**
+     * The name of the field being validated.
+     *
+     * @var string
+     */
+    protected $field;
+
+    /**
+     * Constructor of the LowercaseRule class.
+     *
+     * @param array $parameters Parameters for the rule (not used in this rule).
+     */
+    public function __construct(protected array $parameters)
+    {
+        // No specific logic needed in the constructor for this rule.
+    }
+
+    /**
+     * Check if the field's value is lowercase.
+     *
+     * @param string $field The name of the field being validated.
+     * @param mixed $value The value of the field being validated.
+     * @param array $data All validation data.
+     * @return bool True if the value is lowercase, false otherwise.
+     */
+    public function passes(string $field, $value, array $data): bool
+    {
+        // Set the field property for use in the message method.
+        $this->field = $field;
+
+        // Check if the value is lowercase.
+        return mb_strtolower($value, 'UTF-8') === $value;
+    }
+
+    /**
+     * Get the validation error message for the lowercase rule.
+     *
+     * @return string Validation error message.
+     */
+    public function message(): string
+    {
+        // Use LangManager to get a translated validation error message.
+        return LangManager::getTranslation('validation.lowercase_rule', [
+            'attribute' => $this->field,
+        ]);
+    }
+}
diff --git a/src/Rules/UpperRule.php b/src/Rules/UpperRule.php
new file mode 100644
index 0000000..e9203cd
--- /dev/null
+++ b/src/Rules/UpperRule.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * UppercaseRule - A validation rule implementation for checking if a field's value is uppercase.
+ *
+ * @package BlakvGhost\PHPValidator\Rules
+ * @author Kabirou ALASSANE
+ * @website https://kabirou-alassane.com
+ * @github https://github.com/BlakvGhost
+ */
+
+namespace BlakvGhost\PHPValidator\Rules;
+
+use BlakvGhost\PHPValidator\LangManager;
+
+class UpperRule implements RuleInterface
+{
+    /**
+     * The name of the field being validated.
+     *
+     * @var string
+     */
+    protected $field;
+
+    /**
+     * Constructor of the UppercaseRule class.
+     *
+     * @param array $parameters Parameters for the rule (not used in this rule).
+     */
+    public function __construct(protected array $parameters)
+    {
+        // No specific logic needed in the constructor for this rule.
+    }
+
+    /**
+     * Check if the field's value is uppercase.
+     *
+     * @param string $field The name of the field being validated.
+     * @param mixed $value The value of the field being validated.
+     * @param array $data All validation data.
+     * @return bool True if the value is uppercase, false otherwise.
+     */
+    public function passes(string $field, $value, array $data): bool
+    {
+        // Set the field property for use in the message method.
+        $this->field = $field;
+
+        // Check if the value is uppercase.
+        return mb_strtoupper($value, 'UTF-8') === $value;
+    }
+
+    /**
+     * Get the validation error message for the uppercase rule.
+     *
+     * @return string Validation error message.
+     */
+    public function message(): string
+    {
+        // Use LangManager to get a translated validation error message.
+        return LangManager::getTranslation('validation.uppercase_rule', [
+            'attribute' => $this->field,
+        ]);
+    }
+}
diff --git a/tests/Feature/RuleTest.php b/tests/Feature/RuleTest.php
index 63004c1..1facab1 100644
--- a/tests/Feature/RuleTest.php
+++ b/tests/Feature/RuleTest.php
@@ -7,7 +7,10 @@
 use BlakvGhost\PHPValidator\Rules\AlphaRule;
 use BlakvGhost\PHPValidator\Rules\ConfirmedRule;
 use BlakvGhost\PHPValidator\Rules\EmailRule;
+use BlakvGhost\PHPValidator\Rules\FileRule;
 use BlakvGhost\PHPValidator\Rules\InRule;
+use BlakvGhost\PHPValidator\Rules\LowercaseRule;
+use BlakvGhost\PHPValidator\Rules\LowerRule;
 use BlakvGhost\PHPValidator\Rules\StringRule;
 use BlakvGhost\PHPValidator\Rules\RequiredRule;
 use BlakvGhost\PHPValidator\Rules\MaxLengthRule;
@@ -16,6 +19,7 @@
 use BlakvGhost\PHPValidator\Rules\NumericRule;
 use BlakvGhost\PHPValidator\Rules\PasswordRule;
 use BlakvGhost\PHPValidator\Rules\SameRule;
+use BlakvGhost\PHPValidator\Rules\UpperRule;
 
 it('validates required rule successfully', function () {
     $validator = new RequiredRule([]);
@@ -234,3 +238,42 @@
         ])
     );
 });
+
+it('validates lowercase rule successfully', function () {
+    $validator = new LowerRule([]);
+
+    expect($validator->passes('field', 'lowercase', []))->toBeTrue();
+    expect($validator->passes('field', 'UPPERCASE', []))->toBeFalse();
+
+    expect($validator->message())->toBe(
+        LangManager::getTranslation('validation.lowercase_rule', [
+            'attribute' => 'field',
+        ])
+    );
+});
+
+it('validates uppercase rule successfully', function () {
+    $validator = new UpperRule([]);
+
+    expect($validator->passes('field', 'lowercase', []))->toBeFalse();
+    expect($validator->passes('field', 'UPPERCASE', []))->toBeTrue();
+
+    expect($validator->message())->toBe(
+        LangManager::getTranslation('validation.uppercase_rule', [
+            'attribute' => 'field',
+        ])
+    );
+});
+
+it('validates file rule successfully', function () {
+    $validator = new FileRule([]);
+
+    expect($validator->passes('field', __FILE__, []))->toBeTrue();
+    expect($validator->passes('field', 'nonexistentfile.txt', []))->toBeFalse();
+
+    expect($validator->message())->toBe(
+        LangManager::getTranslation('validation.file_rule', [
+            'attribute' => 'field',
+        ])
+    );
+});
\ No newline at end of file