New version with improvements by ddidier.

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    phony_rails (0.1.6)
+    phony_rails (0.1.8)
       activerecord (~> 3.0)
       countries (~> 0.8.2)
       phony (~> 1.7.7)

README.md

@@ -62,6 +62,8 @@ so we can use:
     validates_plausible_phone :phone_number, :without => /^\+\d+/
     validates_plausible_phone :phone_number, :presence => true, :with => /^\+\d+/
 
+the i18n key is `:improbable_phone`
+
 ### Display / Views
 
 In your views use:
@@ -76,6 +78,9 @@ Say you want to find a record by a phone number. Best is to normalize user input
 
 ## Changelog
 
+0.1.8
+* Improved validation methods by ddidier.
+
 0.1.6
 * Added :as option to phony_normalize.
 

lib/phony_rails.rb

@@ -40,8 +40,8 @@ def self.extended(base)
     end
 
     module InstanceMethods
-  
-    private
+
+      private
 
       # This methods sets the attribute to the normalized version.
       # It also adds the country_code (number), eg. 31 for NL numbers.
@@ -70,7 +70,7 @@ def phony_normalize(*attributes)
         attributes.each do |attribute|
           raise ArgumentError, "No attribute #{attribute} found on #{self.class.name} (PhonyRails)" if not self.attribute_method?(attribute)
           # Add before validation that saves a normalized version of the phone number
-          self.before_validation do 
+          self.before_validation do
             set_phony_normalized_numbers(attributes, options)
           end
         end
@@ -80,7 +80,7 @@ def phony_normalize(*attributes)
       #   phony_normalized_method :fax_number, :default_country_code => 'US'
       # Creates a normalized_fax_number method.
       def phony_normalized_method(*attributes)
-        main_options = attributes.last.is_a?(Hash) ? attributes.pop : {} 
+        main_options = attributes.last.is_a?(Hash) ? attributes.pop : {}
         main_options.assert_valid_keys :country_code, :default_country_code
         attributes.each do |attribute|
           raise StandardError, "Instance method normalized_#{attribute} already exists on #{self.name} (PhonyRails)" if self.instance_methods.include?(:"normalized_#{attribute}")
@@ -97,4 +97,9 @@ def phony_normalized_method(*attributes)
   end
 
 end
-ActiveRecord::Base.extend PhonyRails::ActiveRecordExtension
+
+ActiveRecord::Base.extend PhonyRails::ActiveRecordExtension
+
+Dir["#{File.dirname(__FILE__)}/phony_rails/locales/*.yml"].each do |file|
+  I18n.load_path << file
+end

lib/phony_rails/locales/en.yml

@@ -0,0 +1,6 @@
+
+en:
+  activerecord:
+    errors:
+      messages:
+        improbable_phone: "is an invalid number"

lib/phony_rails/locales/fr.yml

@@ -0,0 +1,6 @@
+
+fr:
+  activerecord:
+    errors:
+      messages:
+        improbable_phone: "est un numéro invalide"

lib/phony_rails/version.rb

@@ -1,3 +1,3 @@
 module PhonyRails
-  VERSION = "0.1.7"
+  VERSION = "0.1.8"
 end

lib/validators/phony_validator.rb

@@ -6,7 +6,7 @@ class PhonyPlausibleValidator < ActiveModel::EachValidator
   # Validates a String using Phony.plausible? method.
   def validate_each(record, attribute, value)
     return if value.blank?
-    record.errors[attribute] << (options[:message] || "is an invalid number") if not Phony.plausible?(value)
+    record.errors.add(attribute,  options[:message] || :improbable_phone) if not Phony.plausible?(value)
   end
 
 end

spec/lib/validators/phony_validator_spec.rb

@@ -1,3 +1,4 @@
+# encoding: utf-8
 require 'spec_helper'
 
 #-----------------------------------------------------------------------------------------------------------------------
@@ -81,6 +82,7 @@ class BigHelpfulHome < ActiveRecord::Base
 # Tests
 #-----------------------------------------------------------------------------------------------------------------------
 
+I18n.locale = :en
 VALID_NUMBER = '123456789'
 INVALID_NUMBER = '123456789 123456789 123456789 123456789'
 
@@ -109,6 +111,22 @@ class BigHelpfulHome < ActiveRecord::Base
       @home.errors.messages.should include(:phone_number => ["is an invalid number"])
     end
 
+    it "should translate the error message in english" do
+      I18n.with_locale(:en) do
+        @home.phone_number = INVALID_NUMBER
+        @home.valid?
+        @home.errors.messages.should include(:phone_number => ["is an invalid number"])
+      end
+    end
+
+    it "should translate the error message in french" do
+      I18n.with_locale(:fr) do
+        @home.phone_number = INVALID_NUMBER
+        @home.valid?
+        @home.errors.messages.should include(:phone_number => ["est un numéro invalide"])
+      end
+    end
+
   end
 end