diff --git a/Gemfile b/Gemfile
index e0d5e86..0a1b6dd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,3 +4,4 @@ gemspec
 
 gem 'pry'
 gem 'simplecov', require: false, group: :test
+gem 'i18n'
diff --git a/README.md b/README.md
index 5af4679..0f86efd 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,28 @@ param! :books_array, Array, required: true  do |b|
 end
 ```
 
+### I18n translate locale
+
+You can custome message for validator
+
+by override method 'custom_rails_param_i18n_path'
+
+## Example
+
+``` ruby
+EmployeeController
+
+en:
+  rails_param:
+    validator:
+      employee:
+        blank: 'Your Message'
+
+def custom_rails_param_i18n_path
+  'rails_param.validator.employee.blank'
+end
+```
+
 ## Thank you
 
 Many thanks to:
diff --git a/lib/rails_param.rb b/lib/rails_param.rb
index aacf237..2465511 100644
--- a/lib/rails_param.rb
+++ b/lib/rails_param.rb
@@ -1,4 +1,6 @@
 require 'rails_param/param'
+require 'i18n'
+
 Dir[File.join(__dir__, 'rails_param/validator', '*.rb')].sort.each { |file| require file }
 Dir[File.join(__dir__, 'rails_param/coercion', '*.rb')].sort.reverse.each { |file| require file }
 Dir[File.join(__dir__, 'rails_param', '*.rb')].sort.each { |file| require file }
@@ -6,3 +8,6 @@
 ActiveSupport.on_load(:action_controller) do
   include RailsParam
 end
+
+I18n.load_path << Dir[File.expand_path("rails/locales") + "/*.yml"]
+I18n.default_locale = :en
diff --git a/lib/rails_param/param_evaluator.rb b/lib/rails_param/param_evaluator.rb
index a619c27..11518b4 100644
--- a/lib/rails_param/param_evaluator.rb
+++ b/lib/rails_param/param_evaluator.rb
@@ -27,7 +27,7 @@ def param!(name, type, options = {}, &block)
       # validate presence
       if params[name].nil? && options[:required]
         raise InvalidParameterError.new(
-          "Parameter #{parameter_name} is required",
+          I18n.t('rails_param.validator.default.required', name: parameter_name),
           param: parameter_name,
           options: options
         )
diff --git a/lib/rails_param/validator.rb b/lib/rails_param/validator.rb
index faa580a..48997eb 100644
--- a/lib/rails_param/validator.rb
+++ b/lib/rails_param/validator.rb
@@ -59,5 +59,13 @@ def valid_value?
       # Should be overwritten in subclass
       false
     end
+
+    def default_rails_param_i18n_path
+      'rails_param.validator.default'
+    end
+
+    def custom_rails_param_i18n_path
+      nil
+    end
   end
 end
diff --git a/lib/rails_param/validator/blank.rb b/lib/rails_param/validator/blank.rb
index aa77284..5695117 100644
--- a/lib/rails_param/validator/blank.rb
+++ b/lib/rails_param/validator/blank.rb
@@ -17,7 +17,10 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} cannot be blank"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.blank",
+          name: name
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/format.rb b/lib/rails_param/validator/format.rb
index e40ff29..4b3ff37 100644
--- a/lib/rails_param/validator/format.rb
+++ b/lib/rails_param/validator/format.rb
@@ -11,8 +11,20 @@ def valid_value?
       STRING_OR_TIME_TYPES = ([String] + TIME_TYPES).freeze
 
       def error_message
-        "Parameter #{name} must be a string if using the format validation" unless matches_string_or_time_types?
-        "Parameter #{name} must match format #{options[:format]}" unless string_in_format?
+        unless matches_string_or_time_types?
+          I18n.t(
+            "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.string_format",
+            name: name
+          )
+        end
+
+        unless string_in_format?
+          I18n.t(
+            "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.options_format",
+            name: name,
+            options: options[:format]
+          )
+        end
       end
 
       def matches_time_types?
diff --git a/lib/rails_param/validator/in.rb b/lib/rails_param/validator/in.rb
index 068d871..827b09a 100644
--- a/lib/rails_param/validator/in.rb
+++ b/lib/rails_param/validator/in.rb
@@ -13,7 +13,10 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{parameter.name} must be within #{parameter.options[:in]}"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.in",
+          name: parameter.name, options: parameter.options[:in]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/is.rb b/lib/rails_param/validator/is.rb
index d1b8c35..1ffa357 100644
--- a/lib/rails_param/validator/is.rb
+++ b/lib/rails_param/validator/is.rb
@@ -8,7 +8,9 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} must be #{options[:is]}"
+        I18n.t("#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.is",
+          name: name, options: options[:is]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/max.rb b/lib/rails_param/validator/max.rb
index 8f715a5..70fe674 100644
--- a/lib/rails_param/validator/max.rb
+++ b/lib/rails_param/validator/max.rb
@@ -8,7 +8,11 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} cannot be greater than #{options[:max]}"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.max",
+          name: name,
+          options: options[:max]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/max_length.rb b/lib/rails_param/validator/max_length.rb
index 6c1d834..4cb44f1 100644
--- a/lib/rails_param/validator/max_length.rb
+++ b/lib/rails_param/validator/max_length.rb
@@ -8,7 +8,11 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} cannot have length greater than #{options[:max_length]}"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.max_length",
+          name: name,
+          options: options[:max_length]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/min.rb b/lib/rails_param/validator/min.rb
index 9ed71c6..1ce8e13 100644
--- a/lib/rails_param/validator/min.rb
+++ b/lib/rails_param/validator/min.rb
@@ -8,7 +8,11 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} cannot be less than #{options[:min]}"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.min",
+          name: name,
+          options: options[:min]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/min_length.rb b/lib/rails_param/validator/min_length.rb
index 6625589..bf76bf0 100644
--- a/lib/rails_param/validator/min_length.rb
+++ b/lib/rails_param/validator/min_length.rb
@@ -8,7 +8,11 @@ def valid_value?
       private
 
       def error_message
-        "Parameter #{name} cannot have length less than #{options[:min_length]}"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.min_length",
+          name: name,
+          options: options[:min_length]
+        )
       end
     end
   end
diff --git a/lib/rails_param/validator/required.rb b/lib/rails_param/validator/required.rb
index 1a18ba0..b31597d 100644
--- a/lib/rails_param/validator/required.rb
+++ b/lib/rails_param/validator/required.rb
@@ -8,7 +8,10 @@ def valid_value?
       end
 
       def error_message
-        "Parameter #{name} is required"
+        I18n.t(
+          "#{custom_rails_param_i18n_path || default_rails_param_i18n_path}.required",
+          name: name
+        )
       end
     end
   end
diff --git a/rails/locales/ar.yml b/rails/locales/ar.yml
new file mode 100644
index 0000000..4b92702
--- /dev/null
+++ b/rails/locales/ar.yml
@@ -0,0 +1,14 @@
+ar:
+  rails_param:
+    validator:
+      default:
+        blank: "لايمكن ان يكون المتغير %{name} فارغا"
+        string_format: "المتغير %{name} يجب ان يكون نص في حالة التحقق من صحة التنسيق"
+        options_format: "المتغير %{name} يجب ان يطابق التنسيق %{options}"
+        in: "المتغير %{name} يجب ان يكون من ضمن %{options}"
+        is: "المتغير %{name} يجب ان يكون %{options}"
+        max_length: "لايمكن ان يكون حجم المتغير اكبر من %{options}"
+        max: "لايمكن ان يكون المتغير %{name} اكبر من %{options}"
+        min_length: "لايمكن ان يكون حجم المتغير %{name} اقل من %{options}"
+        min: "لايمكن ان يكون المتغير %{name} اقل من %{options}"
+        required: "المتغير %{name} مطلوب"
diff --git a/rails/locales/en.yml b/rails/locales/en.yml
new file mode 100644
index 0000000..1aff6b3
--- /dev/null
+++ b/rails/locales/en.yml
@@ -0,0 +1,14 @@
+en:
+  rails_param:
+    validator:
+      default:
+        blank: "Parameter %{name} cannot be blank"
+        string_format: "Parameter %{name} must be a string if using the format validation"
+        options_format: "Parameter %{name} must match format %{options}"
+        in: "Parameter %{name} must be within %{options}"
+        is: "Parameter %{name} must be %{options}"
+        max_length: "Parameter %{name} cannot have length greater than %{options}"
+        max: "Parameter %{name} cannot be greater than %{options}"
+        min_length: "Parameter %{name} cannot have length less than %{options}"
+        min: "Parameter %{name} cannot be less than %{options}"
+        required: "Parameter %{name} is required"
diff --git a/spec/rails_param/validator/blank_spec.rb b/spec/rails_param/validator/blank_spec.rb
index b711376..407ccec 100644
--- a/spec/rails_param/validator/blank_spec.rb
+++ b/spec/rails_param/validator/blank_spec.rb
@@ -4,6 +4,7 @@
   let(:name)          { "foo" }
   let(:options)       { { blank: false } }
   let(:type)          { String }
+  let(:locale)        { :en }
   let(:error_message) { "Parameter foo cannot be blank" }
   let(:parameter) do
     RailsParam::Parameter.new(
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "String" do
       context "is not empty" do
         let(:value) { "bar" }
@@ -40,6 +43,7 @@
 
       context "is empty" do
         let(:value) { {} }
+        let(:locale) { :en }
 
         it_behaves_like "raises InvalidParameterError"
       end
@@ -54,6 +58,7 @@
 
       context "is empty" do
         let(:value) { [] }
+        let(:locale) { :en }
 
         it_behaves_like "raises InvalidParameterError"
       end
@@ -70,6 +75,7 @@
 
       context "is empty" do
         let(:value) { ActionController::Parameters.new() }
+        let(:locale) { :en }
 
         it_behaves_like "raises InvalidParameterError"
       end
@@ -84,9 +90,18 @@
 
       context "is empty" do
         let(:value) { nil }
+        let(:locale) { :en }
 
         it_behaves_like "raises InvalidParameterError"
       end
     end
+
+    context "is locale ar" do
+      let(:locale) { :ar }
+      let(:error_message) { "لايمكن ان يكون المتغير foo فارغا" }
+      let(:value) { "" }
+
+      it_behaves_like "raises InvalidParameterError"
+    end
   end
 end
diff --git a/spec/rails_param/validator/custom_spec.rb b/spec/rails_param/validator/custom_spec.rb
index 9efebac..eeae168 100644
--- a/spec/rails_param/validator/custom_spec.rb
+++ b/spec/rails_param/validator/custom_spec.rb
@@ -5,6 +5,7 @@
   let(:name)              { "foo" }
   let(:options)           { { custom: custom_validation } }
   let(:type)              { String }
+  let(:locale)            { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:value) { 50 }
 
@@ -26,6 +29,7 @@
     context "value given is invalid" do
       let(:value)         { 51 }
       let(:error_message) { "Number is not even" }
+      let(:locale) { :en }
 
       it_behaves_like "raises InvalidParameterError"
     end
diff --git a/spec/rails_param/validator/format_spec.rb b/spec/rails_param/validator/format_spec.rb
index 978ee9f..5ecc8bd 100644
--- a/spec/rails_param/validator/format_spec.rb
+++ b/spec/rails_param/validator/format_spec.rb
@@ -5,6 +5,7 @@
   let(:name)              { "foo" }
   let(:options)           { { format: format_validation } }
   let(:type)              { String }
+  let(:locale)            { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:value) { "50$" }
 
@@ -29,5 +32,13 @@
 
       it_behaves_like "raises InvalidParameterError"
     end
+
+    context "is locale ar" do
+      let(:locale)         { :ar }
+      let(:error_message)  { "المتغير foo يجب ان يطابق التنسيق #{format_validation}" }
+      let(:value)          { "50" }
+
+      it_behaves_like "raises InvalidParameterError"
+    end
   end
 end
diff --git a/spec/rails_param/validator/in_spec.rb b/spec/rails_param/validator/in_spec.rb
index 8cf54f7..892ddba 100644
--- a/spec/rails_param/validator/in_spec.rb
+++ b/spec/rails_param/validator/in_spec.rb
@@ -5,6 +5,7 @@
   let(:name)    { "foo" }
   let(:options) { { in: in_validation } }
   let(:type)    { Integer }
+  let(:locale)  { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:in_validation) { 1..100 }
 
@@ -29,5 +32,13 @@
 
       it_behaves_like "raises InvalidParameterError"
     end
+
+    context "is locale ar" do
+      let(:locale)         { :ar }
+      let(:error_message)  { "المتغير foo يجب ان يكون من ضمن 51..100" }
+      let(:in_validation)          { 51..100 }
+
+      it_behaves_like "raises InvalidParameterError"
+    end
   end
 end
diff --git a/spec/rails_param/validator/is_spec.rb b/spec/rails_param/validator/is_spec.rb
index 672baeb..e94f620 100644
--- a/spec/rails_param/validator/is_spec.rb
+++ b/spec/rails_param/validator/is_spec.rb
@@ -4,6 +4,7 @@
   let(:name)    { "foo" }
   let(:options) { { is: "50" } }
   let(:type)    { String }
+  let(:locale)         { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -16,6 +17,7 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
     context "value given is valid" do
       let(:value) { "50" }
 
@@ -28,5 +30,13 @@
 
       it_behaves_like "raises InvalidParameterError"
     end
+
+    context "is locale ar" do
+      let(:locale)         { :ar }
+      let(:error_message)  { "المتغير foo يجب ان يكون 50" }
+      let(:value)          { "51" }
+
+      it_behaves_like "raises InvalidParameterError"
+    end
   end
 end
diff --git a/spec/rails_param/validator/max_length_spec.rb b/spec/rails_param/validator/max_length_spec.rb
index 29bc217..ddf5315 100644
--- a/spec/rails_param/validator/max_length_spec.rb
+++ b/spec/rails_param/validator/max_length_spec.rb
@@ -5,6 +5,7 @@
   let(:value)   { "bar" }
   let(:options) { { max_length: max_length } }
   let(:type)    { String }
+  let(:locale)    { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:max_length) { 3 }
 
diff --git a/spec/rails_param/validator/max_spec.rb b/spec/rails_param/validator/max_spec.rb
index 4ea1af6..82054e7 100644
--- a/spec/rails_param/validator/max_spec.rb
+++ b/spec/rails_param/validator/max_spec.rb
@@ -5,6 +5,7 @@
   let(:value)   { 50 }
   let(:options) { { max: max } }
   let(:type)    { Integer }
+  let(:locale)    { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:max) { 50 }
 
diff --git a/spec/rails_param/validator/min_length_spec.rb b/spec/rails_param/validator/min_length_spec.rb
index ef73246..2330a67 100644
--- a/spec/rails_param/validator/min_length_spec.rb
+++ b/spec/rails_param/validator/min_length_spec.rb
@@ -5,6 +5,7 @@
   let(:value)   { "bar" }
   let(:options) { { min_length: min_length } }
   let(:type)    { String }
+  let(:locale)    { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:min_length) { 3 }
 
diff --git a/spec/rails_param/validator/min_spec.rb b/spec/rails_param/validator/min_spec.rb
index 1c33ed0..e7294ac 100644
--- a/spec/rails_param/validator/min_spec.rb
+++ b/spec/rails_param/validator/min_spec.rb
@@ -5,6 +5,7 @@
   let(:value)   { 50 }
   let(:options) { { min: min } }
   let(:type)    { Integer }
+  let(:locale)    { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -17,6 +18,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is valid" do
       let(:min) { 50 }
 
diff --git a/spec/rails_param/validator/required_spec.rb b/spec/rails_param/validator/required_spec.rb
index 0d935d7..e5c2654 100644
--- a/spec/rails_param/validator/required_spec.rb
+++ b/spec/rails_param/validator/required_spec.rb
@@ -4,6 +4,7 @@
   let(:name)    { "foo" }
   let(:options) { { required: true } }
   let(:type)    { String }
+  let(:locale)    { :en }
   let(:parameter) do
     RailsParam::Parameter.new(
       name: name,
@@ -16,6 +17,8 @@
   subject { described_class.new(parameter) }
 
   describe "#validate!" do
+    before { I18n.locale = locale }
+
     context "value given is present" do
       let(:value) { "bar" }