diff --git a/Gemfile b/Gemfile
index 615629f..8d5682f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,6 +31,7 @@ gem 'fancybox-rails'
 gem 'friendly_id', '~> 4.0.0.beta14'
 gem 'simple-navigation'
 gem 'kaminari'
+gem 'globalize3'
 
 group :development do
   gem 'rack-webconsole'
diff --git a/Gemfile.lock b/Gemfile.lock
index 9a2223b..9160fd8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
     addressable (2.2.6)
     arel (2.2.1)
     builder (3.0.0)
-    capybara (1.1.1)
+    capybara (1.1.2)
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
@@ -49,7 +49,7 @@ GEM
       capybara (>= 1.0.0, < 1.2)
     carrierwave (0.5.7)
       activesupport (~> 3.0)
-    childprocess (0.2.2)
+    childprocess (0.3.0)
       ffi (~> 1.0.6)
     chunky_png (1.2.4)
     coderay (1.0.0)
@@ -60,17 +60,16 @@ GEM
     css-bootstrap-rails (0.0.6)
       railties (~> 3.1)
       thor (~> 0.14)
-    cucumber (1.1.0)
+    cucumber (1.1.4)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.2)
-      gherkin (~> 2.5.0)
+      gherkin (~> 2.7.1)
       json (>= 1.4.6)
       term-ansicolor (>= 1.0.6)
-    cucumber-rails (0.5.2)
-      capybara (>= 1.0.0.rc1)
-      cucumber (>= 0.10.5)
-      nokogiri (>= 1.4.4)
-      rack-test (>= 0.5.7)
+    cucumber-rails (1.2.1)
+      capybara (>= 1.1.2)
+      cucumber (>= 1.1.3)
+      nokogiri (>= 1.5.0)
     database_cleaner (0.6.7)
     diff-lcs (1.1.3)
     erubis (2.7.0)
@@ -79,7 +78,7 @@ GEM
       multi_json (~> 1.0)
     fancybox-rails (0.1.4)
       railties (>= 3.1.0)
-    ffi (1.0.9)
+    ffi (1.0.11)
     fog (1.1.1)
       builder
       excon (~> 0.7.4)
@@ -96,10 +95,13 @@ GEM
     formalize-rails (0.0.4)
       railties (~> 3.1.0.rc1)
     formatador (0.2.1)
-    friendly_id (4.0.0.beta14)
+    friendly_id (4.0.0)
     fssm (0.2.7)
-    gherkin (2.5.1)
+    gherkin (2.7.4)
       json (>= 1.4.6)
+    globalize3 (0.1.0)
+      activemodel (>= 3.0.0)
+      activerecord (>= 3.0.0)
     growl (1.0.3)
     guard (0.7.0)
       thor (~> 0.14.6)
@@ -127,8 +129,7 @@ GEM
     jquery-rails (1.0.14)
       railties (~> 3.0)
       thor (~> 0.14)
-    json (1.6.4)
-    json_pure (1.6.1)
+    json (1.6.5)
     kaminari (0.12.4)
       rails (>= 3.0.0)
     kgio (2.6.0)
@@ -163,7 +164,7 @@ GEM
       method_source (>= 0.6.5)
       ruby_parser (>= 2.0.5)
       slop (~> 2.1.0)
-    rack (1.3.5)
+    rack (1.3.6)
     rack-cache (1.1)
       rack (>= 0.4)
     rack-mount (0.8.3)
@@ -203,7 +204,7 @@ GEM
     ruby-hmac (0.4.0)
     ruby_parser (2.3.1)
       sexp_processor (~> 3.0)
-    rubyzip (0.9.4)
+    rubyzip (0.9.5)
     sass (3.1.7)
     sass-rails (3.1.2)
       actionpack (~> 3.1.0)
@@ -211,10 +212,10 @@ GEM
       sass (>= 3.1.4)
       sprockets (~> 2.0.0)
       tilt (~> 1.3.2)
-    selenium-webdriver (2.7.0)
-      childprocess (>= 0.2.1)
-      ffi (>= 1.0.7)
-      json_pure
+    selenium-webdriver (2.17.0)
+      childprocess (>= 0.2.5)
+      ffi (~> 1.0.9)
+      multi_json (~> 1.0.4)
       rubyzip
     sexp_processor (3.0.7)
     simple-navigation (3.6.0)
@@ -237,7 +238,7 @@ GEM
     sqlite3 (1.3.4)
     subexec (0.1.0)
     temple (0.3.4)
-    term-ansicolor (1.0.6)
+    term-ansicolor (1.0.7)
     thor (0.14.6)
     tilt (1.3.3)
     treetop (1.4.10)
@@ -273,6 +274,7 @@ DEPENDENCIES
   foreman
   formalize-rails
   friendly_id (~> 4.0.0.beta14)
+  globalize3
   growl
   guard
   guard-cucumber
diff --git a/Guardfile b/Guardfile
index ad7c2a2..a28de05 100644
--- a/Guardfile
+++ b/Guardfile
@@ -4,6 +4,7 @@ end
 
 guard 'minitest', drb: false, rubygems: false, bundler: false, notify: false do
   watch(%r{app/(.+)/(.+)\.rb})                  { |m| "spec/#{m[1]}/#{m[2]}_spec.rb" }
+  watch(%r{lib/(.+)\.rb})                       { |m| "spec/lib/#{m[1]}_spec.rb" }
   watch(%r{spec/(.+)/(.+)_spec\.rb})
   watch(%r{spec/spec_helper.rb})               { "test" }
 end
diff --git a/app/assets/stylesheets/partials/_layout.sass b/app/assets/stylesheets/partials/_layout.sass
index 448bcd6..73cedd1 100644
--- a/app/assets/stylesheets/partials/_layout.sass
+++ b/app/assets/stylesheets/partials/_layout.sass
@@ -4,7 +4,7 @@ $silvia-color: #741519
 $menu-color: #666666
 
 #sidebar
-  position: fixed
+  position: absolute
   top: 0px
   left: 0px
 
diff --git a/app/assets/stylesheets/partials/_sidebar.sass b/app/assets/stylesheets/partials/_sidebar.sass
index 63e54fb..414a2e2 100644
--- a/app/assets/stylesheets/partials/_sidebar.sass
+++ b/app/assets/stylesheets/partials/_sidebar.sass
@@ -14,7 +14,7 @@
       height: 352px
       display: block
 
-  ul#sidebar_navigation li
+  ul#sidebar_navigation li, ul#language li
     +horizontal-list
     margin-bottom: 10px
     padding: 9px
@@ -38,8 +38,12 @@
       &:hover
         color: $silvia-color
 
+  ul#language
+    margin-top: 15px
+
   ul#social
     list-style-type: none
+    height: 30px
     li
       a
         float: left
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 4399b57..363212e 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,8 +1,10 @@
-require "application_responder"
+require 'application_responder'
+require 'locale_detector'
 
 class ApplicationController < ActionController::Base
   self.responder = ApplicationResponder
   respond_to :html
+  before_filter :set_locale
 
   protect_from_forgery
 
@@ -18,4 +20,9 @@ def select_layout
   def pjax_request?
     request.headers['X-PJAX']
   end
+
+  def set_locale
+    session[:locale] = LocaleDetector.new(params, session, request.env).detect
+    I18n.locale = session[:locale]
+  end
 end
diff --git a/app/controllers/contact_forms_controller.rb b/app/controllers/contact_forms_controller.rb
index 9d6fa52..f2a2003 100644
--- a/app/controllers/contact_forms_controller.rb
+++ b/app/controllers/contact_forms_controller.rb
@@ -7,7 +7,7 @@ def create
     @contact_form = ContactForm.new(params[:contact_form])
     @contact_form.request = request
     if @contact_form.deliver
-      flash.now[:notice] = 'Thank you for contacting me! You will be receiving an answer soon'
+      flash.now[:notice] = t('contact_forms.thank_you')
     end
     render action: 'new'
   end
diff --git a/app/models/category.rb b/app/models/category.rb
index 11f0c45..4820248 100644
--- a/app/models/category.rb
+++ b/app/models/category.rb
@@ -1,15 +1,36 @@
 # Categories are used to classify Illustrations and Videos
 class Category < ActiveRecord::Base
   extend FriendlyId
-  friendly_id :name, use: :slugged
+  include GlobalizeExtensions
+
+  friendly_id :name, use: :simple_i18n
   validates :name, presence: true
 
   has_many :illustrations, dependent: :nullify
   has_many :videos, dependent: :nullify
 
+  translates :name
+  translate_accessors_in :ca, :es
+  before_save :set_friendly_id
+
   # A simple scope to just return active categories
   #
   def self.active
     where(active: true)
   end
+
+  # Never generate automatically a new slug because it has problems with
+  # multiple locales.
+  def should_generate_new_friendly_id?
+    false
+  end
+
+  # Set the slug in all available locales
+  def set_friendly_id(*args)
+    I18n.available_locales.each do |locale|
+      I18n.with_locale(locale) do
+        super(name, locale)
+      end
+    end
+  end
 end
diff --git a/app/models/concerns/globalize_extensions.rb b/app/models/concerns/globalize_extensions.rb
new file mode 100644
index 0000000..59de71f
--- /dev/null
+++ b/app/models/concerns/globalize_extensions.rb
@@ -0,0 +1,23 @@
+module GlobalizeExtensions
+  extend ActiveSupport::Concern
+
+  included do
+    def self.translate_accessors_in(*locales)
+      locales.each do |locale|
+        translated_attribute_names.each do |field|
+          define_method("#{field}_#{locale}") do
+            ::Globalize.with_locale(locale) do
+              self.send("#{field}")
+            end
+          end
+
+          define_method("#{field}_#{locale}=") do |value|
+            ::Globalize.with_locale(locale) do
+              self.send("#{field}=", value)
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/app/models/illustration.rb b/app/models/illustration.rb
index cca9373..393f4f1 100644
--- a/app/models/illustration.rb
+++ b/app/models/illustration.rb
@@ -1,9 +1,10 @@
 # An Illustration is a media type with a picture attached
-#
 class Illustration < ActiveRecord::Base
   include Thumbnailer
+  include GlobalizeExtensions
   extend FriendlyId
-  friendly_id :name, use: :slugged
+
+  friendly_id :name, use: :simple_i18n
 
   default_scope order('created_at')
 
@@ -14,6 +15,10 @@ class Illustration < ActiveRecord::Base
   # A category is needed in order to classify the illustration
   belongs_to :category
 
+  translates :name, :description
+  translate_accessors_in :ca, :es
+  before_save :set_friendly_id
+
   # A scope to get illustration that belong to a category
   #
   # category - The Category that illustration shoudl belong to
@@ -22,4 +27,19 @@ class Illustration < ActiveRecord::Base
   def self.by_category(category)
     where(category_id: category)
   end
+
+  # Never generate automatically a new slug because it has problems with
+  # multiple locales.
+  def should_generate_new_friendly_id?
+    false
+  end
+
+  # Set the slug in all available locales
+  def set_friendly_id(*args)
+    I18n.available_locales.each do |locale|
+      I18n.with_locale(locale) do
+        super(name, locale)
+      end
+    end
+  end
 end
diff --git a/app/models/video.rb b/app/models/video.rb
index 1ebce03..83df104 100644
--- a/app/models/video.rb
+++ b/app/models/video.rb
@@ -1,6 +1,10 @@
 # A Video is a media type with a linked video to an external service
 class Video < ActiveRecord::Base
+  include GlobalizeExtensions
+  belongs_to :category
+
   validates :name, :url, :category, presence: true
 
-  belongs_to :category
+  translates :name, :description
+  translate_accessors_in :ca, :es
 end
diff --git a/app/views/backend/categories/_form.html.slim b/app/views/backend/categories/_form.html.slim
new file mode 100644
index 0000000..956cdfa
--- /dev/null
+++ b/app/views/backend/categories/_form.html.slim
@@ -0,0 +1,5 @@
+= simple_form_for [ :backend, resource ] do |f|
+  = f.input :name_ca
+  = f.input :name_es
+  = f.input :active
+  = f.submit
diff --git a/app/views/backend/illustrations/_form.html.slim b/app/views/backend/illustrations/_form.html.slim
index 9d9d99e..7a64183 100644
--- a/app/views/backend/illustrations/_form.html.slim
+++ b/app/views/backend/illustrations/_form.html.slim
@@ -1,6 +1,8 @@
 = simple_form_for [ :backend, resource ] do |f|
-  - (attributes - ['image', 'category_id', 'slug']).each do |attr|
-    = f.input attr
+  = f.input :name_ca, required: true
+  = f.input :name_es, required: true
+  = f.input :description_ca, as: :text
+  = f.input :description_es, as: :text
 
   #illustration
     = f.input :image
diff --git a/app/views/backend/illustrations/_show.html.slim b/app/views/backend/illustrations/_show.html.slim
index 79f3249..290fa7f 100644
--- a/app/views/backend/illustrations/_show.html.slim
+++ b/app/views/backend/illustrations/_show.html.slim
@@ -1,5 +1,5 @@
 dl
-  - (attributes - %w(image thumbnail_coordinates category_id)).each do |attr|
+  - (attributes - %w(image thumbnail_coordinates category_id) + %w(name_ca name_es description_ca description_es)).each do |attr|
     dt= resource_class.human_attribute_name(attr)
     dd= resource.public_send(attr)
   dt= resource_class.human_attribute_name(:image)
diff --git a/app/views/backend/resource/new.html.slim b/app/views/backend/resource/new.html.slim
index 2f28f34..87c2bc7 100644
--- a/app/views/backend/resource/new.html.slim
+++ b/app/views/backend/resource/new.html.slim
@@ -1,6 +1,6 @@
 .block
   .content
-    h2 New #{resource_class.model_name.human}
+    h2=resource_class.model_name.human
 
     .inner
       = render "form", attributes: attributes
diff --git a/app/views/backend/videos/_form.html.slim b/app/views/backend/videos/_form.html.slim
new file mode 100644
index 0000000..962caf4
--- /dev/null
+++ b/app/views/backend/videos/_form.html.slim
@@ -0,0 +1,9 @@
+= simple_form_for [ :backend, resource ] do |f|
+  = f.input :name_ca, required: true
+  = f.input :name_es, required: true
+  = f.input :description_ca, as: :text
+  = f.input :description_es, as: :text
+  = f.input :url
+  = f.association :category, collection: Category.all
+  = f.submit
+
diff --git a/app/views/contact_forms/new.html.slim b/app/views/contact_forms/new.html.slim
index 0be18d7..611ae61 100644
--- a/app/views/contact_forms/new.html.slim
+++ b/app/views/contact_forms/new.html.slim
@@ -5,7 +5,7 @@ section#contact
 
   section#contact-form
     = twitter_bootstrap_form_for @contact_form, url: contact_path, validate: false do |f|
-      =f.inputs 'Contacte' do
+      =f.inputs t('.title') do
         =f.text_field :name
         =f.email_field :email, placeholder: 'email@example.org'
         =f.text_area :message, class: 'xxlarge'
diff --git a/app/views/layouts/_sidebar.html.slim b/app/views/layouts/_sidebar.html.slim
index b4b32d4..2599c13 100644
--- a/app/views/layouts/_sidebar.html.slim
+++ b/app/views/layouts/_sidebar.html.slim
@@ -5,3 +5,4 @@ h1
 nav
   ==render_navigation(context: :sidebar)
   ==render_navigation(context: :social)
+  ==render_navigation(context: :language)
diff --git a/config/application.rb b/config/application.rb
index 9ab2aa2..e46993c 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -18,6 +18,7 @@ class Application < Rails::Application
     # Custom directories with classes and modules you want to be autoloadable.
     config.autoload_paths += %W(
       #{config.root}/app/services
+      #{config.root}/app/models/concerns
     )
 
     # Only load the plugins named here, in the order given (default is alphabetical).
@@ -34,6 +35,7 @@ class Application < Rails::Application
     # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
     # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
     config.i18n.default_locale = :ca
+    config.i18n.fallbacks = true
 
     # Please note that JavaScript expansions are *ignored altogether* if the asset
     # pipeline is enabled (see config.assets.enabled below). Put your defaults in
diff --git a/config/initializers/i18n.rb b/config/initializers/i18n.rb
new file mode 100644
index 0000000..f0deb02
--- /dev/null
+++ b/config/initializers/i18n.rb
@@ -0,0 +1 @@
+I18n.available_locales = [:ca, :es]
diff --git a/config/language_navigation.rb b/config/language_navigation.rb
new file mode 100644
index 0000000..75295c8
--- /dev/null
+++ b/config/language_navigation.rb
@@ -0,0 +1,10 @@
+#encoding: utf-8
+
+SimpleNavigation::Configuration.run do |navigation|
+  navigation.items do |primary|
+    primary.dom_id = 'language'
+    primary.item 'ca', 'Català', request.path + '?locale=ca'
+    primary.item 'es', 'Español', request.path + '?locale=es'
+  end
+end
+
diff --git a/config/locales/ca.yml b/config/locales/ca.yml
index 5e3687c..e8f086c 100644
--- a/config/locales/ca.yml
+++ b/config/locales/ca.yml
@@ -6,13 +6,25 @@ ca:
       category: Categoria
       categories: Categories
     attributes:
+      video:
+        name: Nom
+        name_ca: Nom (català)
+        name_es: Nom (castellà)
+        description_ca: Descripció (català)
+        description_es: Descripció (castellà)
+        category: Categoria
       illustration:
         name: Nom
-        description: Descripció
+        name_ca: Nom (català)
+        name_es: Nom (castellà)
+        description_ca: Descripció (català)
+        description_es: Descripció (castellà)
         image: Imatge
         category: Categoria
       category:
         name: Nom
+        name_ca: Nom (català)
+        name_es: Nom (castellà)
         active: Activa
   flash:
     actions:
@@ -25,6 +37,10 @@ ca:
       destroy:
         notice: '%{resource_name} was successfully destroyed.'
         alert: '%{resource_name} could not be destroyed.'
+  contact_forms:
+    new:
+      title: 'Contacte'
+    thank_you: 'Gràcies per posar-te en contacte amb mi. Aviat rebràs una resposta!'
   helpers:
     label:
       contact_form:
@@ -34,6 +50,10 @@ ca:
     submit:
       contact_form:
         create: 'Enviar'
+  navigation:
+    sidebar:
+      about: 'qui sóc?'
+      contact: 'contacte'
   views:
     pagination:
       previous: "&larr; Anterior"
diff --git a/config/locales/es.yml b/config/locales/es.yml
new file mode 100644
index 0000000..26859bc
--- /dev/null
+++ b/config/locales/es.yml
@@ -0,0 +1,24 @@
+es:
+  contact_forms:
+    new:
+      title: 'Contacto'
+    thank_you: 'Gracias por ponerte en contacto conmigo. ¡Pronto recibirás una respuesta!'
+  helpers:
+    label:
+      contact_form:
+        name: Nombre
+        email: Correo electrónico
+        message: Mensaje
+    submit:
+      contact_form:
+        create: 'Enviar'
+  navigation:
+    sidebar:
+      about: '¿quién soy?'
+      contact: 'contacto'
+  views:
+    pagination:
+      previous: "&larr; Anterior"
+      next: "Siguiente &rarr;"
+      truncate: "..."
+
diff --git a/config/sidebar_navigation.rb b/config/sidebar_navigation.rb
index 53e05fa..59e974a 100644
--- a/config/sidebar_navigation.rb
+++ b/config/sidebar_navigation.rb
@@ -3,8 +3,8 @@
 SimpleNavigation::Configuration.run do |navigation|
   navigation.items do |primary|
     primary.dom_id = 'sidebar_navigation'
-    primary.item 'about', 'qui sóc?', page_path('about')
-    primary.item 'contact', 'contacte', new_contact_path
+    primary.item 'about', I18n.t('navigation.sidebar.about'), page_path('about')
+    primary.item 'contact', I18n.t('navigation.sidebar.contact'), new_contact_path
     primary.item 'phone', '668 860 931'
   end
 end
diff --git a/db/migrate/20120123122809_create_globalize_tables.rb b/db/migrate/20120123122809_create_globalize_tables.rb
new file mode 100644
index 0000000..8c3bbbb
--- /dev/null
+++ b/db/migrate/20120123122809_create_globalize_tables.rb
@@ -0,0 +1,29 @@
+class CreateGlobalizeTables < ActiveRecord::Migration
+  def up
+    Category.create_translation_table!({
+      name: :string,
+    }, {
+      migrate_data: true
+    })
+
+    Illustration.create_translation_table!({
+      name: :string,
+      description:  :text
+    }, {
+      migrate_data: true
+    })
+
+    Video.create_translation_table!({
+      name: :string,
+      description:  :text
+    }, {
+      migrate_data: true
+    })
+  end
+
+  def down
+    Category.drop_translation_table!
+    Illustration.drop_translation_table!
+    Video.drop_translation_table!
+  end
+end
diff --git a/db/migrate/20120123183023_translate_slugs.rb b/db/migrate/20120123183023_translate_slugs.rb
new file mode 100644
index 0000000..1c49975
--- /dev/null
+++ b/db/migrate/20120123183023_translate_slugs.rb
@@ -0,0 +1,27 @@
+class TranslateSlugs < ActiveRecord::Migration
+  def up
+    rename_column :illustrations, :slug, :slug_ca
+    add_column :illustrations, :slug_es, :string
+    add_index :illustrations, :slug_es
+
+    rename_column :categories, :slug, :slug_ca
+    add_column :categories, :slug_es, :string
+    add_index :categories, :slug_es
+
+    add_column :videos, :slug_ca, :string
+    add_column :videos, :slug_es, :string
+    add_index :videos, :slug_ca
+    add_index :videos, :slug_es
+  end
+
+  def down
+    rename_column :illustrations, :slug_ca, :slug
+    remove_column :illustrations, :slug_es
+
+    rename_column :categories, :slug_ca, :slug
+    remove_column :categories, :slug_es
+
+    remove_column :videos, :slug_ca
+    remove_column :videos, :slug_es
+  end
+end
diff --git a/db/migrate/20120123184625_copy_catalan_slugs_to_spanish.rb b/db/migrate/20120123184625_copy_catalan_slugs_to_spanish.rb
new file mode 100644
index 0000000..7e9ee14
--- /dev/null
+++ b/db/migrate/20120123184625_copy_catalan_slugs_to_spanish.rb
@@ -0,0 +1,15 @@
+class CopyCatalanSlugsToSpanish < ActiveRecord::Migration
+  def up
+    Illustration.find_each do |record|
+      record.set_friendly_id(record.slug_ca, :es)
+    end
+
+    Category.find_each do |record|
+      record.set_friendly_id(record.slug_ca, :es)
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end
diff --git a/db/migrate/20120123190025_remove_translated_columns.rb b/db/migrate/20120123190025_remove_translated_columns.rb
new file mode 100644
index 0000000..ee4e99b
--- /dev/null
+++ b/db/migrate/20120123190025_remove_translated_columns.rb
@@ -0,0 +1,13 @@
+class RemoveTranslatedColumns < ActiveRecord::Migration
+  def up
+    remove_column :categories, :name
+    remove_column :illustrations, :name
+    remove_column :illustrations, :description
+    remove_column :videos, :name
+    remove_column :videos, :description
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 95e855d..df55fb5 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,39 +11,74 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20111206190441) do
+ActiveRecord::Schema.define(:version => 20120123190025) do
 
   create_table "categories", :force => true do |t|
-    t.string   "name"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.boolean  "active"
-    t.string   "slug"
+    t.string   "slug_ca"
+    t.string   "slug_es"
   end
 
-  add_index "categories", ["name"], :name => "index_categories_on_name"
-  add_index "categories", ["slug"], :name => "index_categories_on_slug"
+  add_index "categories", ["slug_ca"], :name => "index_categories_on_slug"
+  add_index "categories", ["slug_es"], :name => "index_categories_on_slug_es"
 
-  create_table "illustrations", :force => true do |t|
+  create_table "category_translations", :force => true do |t|
+    t.integer  "category_id"
+    t.string   "locale"
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "category_translations", ["category_id"], :name => "index_category_translations_on_category_id"
+
+  create_table "illustration_translations", :force => true do |t|
+    t.integer  "illustration_id"
+    t.string   "locale"
     t.string   "name"
     t.text     "description"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "illustration_translations", ["illustration_id"], :name => "index_b0c98806d31be981f03b71bdd325c9417e68cd00"
+
+  create_table "illustrations", :force => true do |t|
     t.string   "image"
     t.text     "thumbnail_coordinates"
     t.integer  "category_id"
     t.datetime "created_at"
     t.datetime "updated_at"
-    t.string   "slug"
+    t.string   "slug_ca"
+    t.string   "slug_es"
   end
 
-  add_index "illustrations", ["slug"], :name => "index_illustrations_on_slug", :unique => true
+  add_index "illustrations", ["slug_ca"], :name => "index_illustrations_on_slug", :unique => true
+  add_index "illustrations", ["slug_es"], :name => "index_illustrations_on_slug_es"
 
-  create_table "videos", :force => true do |t|
+  create_table "video_translations", :force => true do |t|
+    t.integer  "video_id"
+    t.string   "locale"
     t.string   "name"
     t.text     "description"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "video_translations", ["video_id"], :name => "index_video_translations_on_video_id"
+
+  create_table "videos", :force => true do |t|
     t.string   "url"
     t.integer  "category_id"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "slug_ca"
+    t.string   "slug_es"
   end
 
+  add_index "videos", ["slug_ca"], :name => "index_videos_on_slug_ca"
+  add_index "videos", ["slug_es"], :name => "index_videos_on_slug_es"
+
 end
diff --git a/features/illustrations/visitor_lists_illustrations.feature b/features/illustrations/visitor_lists_illustrations.feature
index b3e7994..ac50182 100644
--- a/features/illustrations/visitor_lists_illustrations.feature
+++ b/features/illustrations/visitor_lists_illustrations.feature
@@ -23,12 +23,6 @@ Feature: Visitor views illustrations
     When I click at the illustration bigger picture
     Then I should see a high-res illustration picture
 
-  Scenario: Visitor views more illustrations using the pagination
-    Given there are even more illustrations
-    And I am on the homepage
-    When I click the pagination link to view more illustrations
-    Then I should see new illustrations
-
   Scenario: Visitor views categorized illustrations
     Given some illustration are categorized with fanart
     And I am on the homepage
diff --git a/features/step_definitions/category_steps.rb b/features/step_definitions/category_steps.rb
index cc1afba..673a5be 100644
--- a/features/step_definitions/category_steps.rb
+++ b/features/step_definitions/category_steps.rb
@@ -7,7 +7,7 @@
 end
 
 Then /^I should see these categories at the main menu$/ do
-  within '#header .menu' do
+  within '#header nav' do
     @categories.each do |category|
       page.has_link?(category.name).must_equal true
     end
@@ -19,7 +19,7 @@
 end
 
 Then /^I should not see these categories$/ do
-  within '#header .menu' do
+  within '#header nav' do
     @categories.each do |category|
       page.has_link?(category.name).must_equal false
     end
diff --git a/features/step_definitions/contact_steps.rb b/features/step_definitions/contact_steps.rb
index 8aed8c4..da77ddf 100644
--- a/features/step_definitions/contact_steps.rb
+++ b/features/step_definitions/contact_steps.rb
@@ -12,7 +12,7 @@
 end
 
 Then /^I should see a message telling me that the contact request has been sent$/ do
-  must_have_confirmation_message('Thank you for contacting me! You will be receiving an answer soon')
+  must_have_confirmation_message('Gràcies per posar-te en contacte amb mi. Aviat rebràs una resposta!')
 end
 
 Then /^Silvia should receive an email with the contact form information$/ do
diff --git a/features/step_definitions/illustration_steps.rb b/features/step_definitions/illustration_steps.rb
index 8c73b19..6ea596e 100644
--- a/features/step_definitions/illustration_steps.rb
+++ b/features/step_definitions/illustration_steps.rb
@@ -6,8 +6,10 @@
 end
 
 When /^I fill the illustration form with all the necessary data$/ do
-  fill_in 'Nom', with: 'Course of witches'
-  fill_in 'Descripció', with: 'Personatge per un còmic'
+  fill_in 'Nom (català)', with: 'Course of witches'
+  fill_in 'Nom (castellà)', with: 'Course of witches castellà'
+  fill_in 'Descripció (català)', with: 'Personatge per un còmic'
+  fill_in 'Descripció (castellà)', with: 'Personatge per un còmic'
   attach_file 'Imatge', Rails.root.join('spec/support/files/illustration.jpg')
   select(@current_category.name, from: 'Categoria')
   click_button 'Crear Il·lustració'
diff --git a/features/step_definitions/locale_steps.rb b/features/step_definitions/locale_steps.rb
new file mode 100644
index 0000000..d037579
--- /dev/null
+++ b/features/step_definitions/locale_steps.rb
@@ -0,0 +1,29 @@
+#encoding: utf-8
+
+When /^I follow Español in the language menu$/ do
+  within '#language' do
+    click_link 'Español'
+  end
+end
+
+Then /^I should see the page in Spanish$/ do
+  page.has_content?('¿quién soy?').must_equal true
+  page.has_content?('contacto').must_equal true
+end
+
+Given /^I am seeing the web in spanish$/ do
+  within '#language' do
+    click_link 'Español'
+  end
+end
+
+When /^I follow Català in the language menu$/ do
+  within '#language' do
+    click_link 'Català'
+  end
+end
+
+Then /^I should see the page in Catalan$/ do
+  page.has_content?('qui sóc?').must_equal true
+  page.has_content?('contacte').must_equal true
+end
diff --git a/features/step_definitions/visitor_steps.rb b/features/step_definitions/visitor_steps.rb
index 141a475..361308f 100644
--- a/features/step_definitions/visitor_steps.rb
+++ b/features/step_definitions/visitor_steps.rb
@@ -8,7 +8,7 @@
 end
 
 Then /^I should see the illustrations$/ do
-  page.has_css?('li.thumbnail', count: @illustrations.length).must_equal true
+  page.has_css?('#gallery #works li', count: @illustrations.length).must_equal true
 end
 
 Then /^I should see the expanded view of the newest illustration$/ do
@@ -43,18 +43,6 @@
   page.has_css?('img#fancybox-img').must_equal true
 end
 
-Given /^there are even more illustrations$/ do
-  @illustrations = @illustrations + Illustration.make!(5)
-end
-
-When /^I click the pagination link to view more illustrations$/ do
-  click_link 'Següent'
-end
-
-Then /^I should see new illustrations$/ do
-  must_see_illustration(@illustrations.last)
-end
-
 Given /^some illustration are categorized with fanart$/ do
   @fanart_illustration = Illustration.make!(category: Category.make(name: 'Fanart'))
 end
diff --git a/features/support/env.rb b/features/support/env.rb
index d87b487..18c974e 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -23,7 +23,17 @@
 end
 
 begin
-  DatabaseCleaner.strategy = :transaction
+  require 'database_cleaner'
+  require 'database_cleaner/cucumber'
+  DatabaseCleaner.strategy = :truncation
 rescue NameError
   raise "You need to add database_cleaner to your Gemfile (in the :test group) if you wish to use it."
 end
+
+Before do
+  DatabaseCleaner.start
+end
+
+After do |scenario|
+  DatabaseCleaner.clean
+end
diff --git a/features/user_changes_locale.feature b/features/user_changes_locale.feature
new file mode 100644
index 0000000..38f737e
--- /dev/null
+++ b/features/user_changes_locale.feature
@@ -0,0 +1,17 @@
+#encoding: utf-8
+
+Feature: Change locale
+  As a user
+  I want to change the locale
+  So I can read the content in my preferred language
+
+  Scenario: User changes the locale to Spanish
+    Given I am on the homepage
+    When I follow Español in the language menu
+    Then I should see the page in Spanish
+
+  Scenario: User switches back to Catalan
+    Given I am on the homepage
+    And I am seeing the web in spanish
+    When I follow Català in the language menu
+    Then I should see the page in Catalan
diff --git a/lib/locale_detector.rb b/lib/locale_detector.rb
new file mode 100644
index 0000000..d691c85
--- /dev/null
+++ b/lib/locale_detector.rb
@@ -0,0 +1,65 @@
+require 'i18n'
+
+# Public: Detect the locale from the current user using different strategies.
+#
+# Examples:
+#
+#
+#   class ApplicationController < ActionController::Base
+#     before_filter :set_locale
+#
+#     def set_locale
+#       session[:locale] = LocaleDetector.new(params, session, request.env).detect
+#       I18n.locale = session[:locale]
+#     end
+#   end
+#
+class LocaleDetector
+
+  # Public: Initialize a LocaleDetector
+  #
+  # params - A Hash with a String key named locale
+  # session - A Hash with a Symbol key named :locale
+  # request - A Hash with a String key named HTTP_ACCEPT_LANGUAGE
+  def initialize(params, session, request)
+    @params, @session, @request = params, session, request
+  end
+
+  # Public: Detect the locale.
+  # It will try to detect it first from the params, then try the session, then
+  # from the request. If all fails fallback to I18n default locale
+  #
+  # Returns a Symbol representing the locale
+  def detect
+    detect_from_params || detect_from_session || detect_from_request || I18n.default_locale
+  end
+
+  # Private: Detect the locale from the params
+  #
+  # Returns a Symbol representing the locale or nil if none was found
+  def detect_from_params
+    @params['locale'].to_sym if available?(@params['locale'])
+  end
+
+  # Private: Detect the locale from the session
+  #
+  # Returns a Symbol representing the locale or nil if none was found
+  def detect_from_session
+    @session[:locale].to_sym if available?(@session[:locale])
+  end
+
+  # Private: Detect the locale from the HTTP request.
+  # It will try to find an available locale from all the accepted by the user.
+  #
+  # Returns a Symbol representing the locale or nil if none was found
+  def detect_from_request
+    locales = @request['HTTP_ACCEPT_LANGUAGE'].to_s.scan(/[a-z]{2}/).uniq
+    locale = locales.detect { |locale| available?(locale) }
+    locale.to_sym if locale
+  end
+
+  private
+  def available?(locale)
+    I18n.available_locales.include?(locale.to_sym) if locale
+  end
+end
diff --git a/spec/database_cleaner_helper.rb b/spec/database_cleaner_helper.rb
new file mode 100644
index 0000000..3242d99
--- /dev/null
+++ b/spec/database_cleaner_helper.rb
@@ -0,0 +1,10 @@
+DatabaseCleaner.strategy = :truncation
+class MiniTest::Spec
+  before do
+    DatabaseCleaner.start
+  end
+
+  after do
+    DatabaseCleaner.clean
+  end
+end
diff --git a/spec/fast_spec_helper.rb b/spec/fast_spec_helper.rb
index 8b71c9d..364fbca 100644
--- a/spec/fast_spec_helper.rb
+++ b/spec/fast_spec_helper.rb
@@ -7,6 +7,12 @@ def setup_active_record
   unless ActiveRecord::Base.connected?
     ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: 'db/test.sqlite')
   end
+  setup_database_cleaner
+end
+
+def setup_database_cleaner
+  require 'database_cleaner'
+  require_relative 'database_cleaner_helper'
 end
 
 def require_model(file)
@@ -24,6 +30,14 @@ def require_service(file)
   require_relative "../app/services/#{file}"
 end
 
+def require_lib(file)
+  require_relative "../lib/#{file}"
+end
+
+def require_concern(file)
+  require_relative "../app/models/concerns/#{file}"
+end
+
 def require_carrierwave
   require 'carrierwave'
   require 'carrierwave/orm/activerecord'
diff --git a/spec/lib/locale_detector_spec.rb b/spec/lib/locale_detector_spec.rb
new file mode 100644
index 0000000..d98c5a4
--- /dev/null
+++ b/spec/lib/locale_detector_spec.rb
@@ -0,0 +1,84 @@
+require 'fast_spec_helper'
+require_lib 'locale_detector'
+
+describe LocaleDetector do
+  let(:params) { {'locale' => 'ca' }}
+  let(:session) { {locale: :ca }}
+  let(:request) { {'HTTP_ACCEPT_LANGUAGE' => 'en-US,en,ca;q=0.8'} }
+
+  subject { LocaleDetector.new(params, session, request) }
+
+  before do
+    I18n.available_locales = [:ca, :es]
+    I18n.default_locale = :de
+    I18n.locale = :ch
+  end
+
+  describe 'detect_from_params' do
+    it 'returns the locale from the params' do
+      subject.detect_from_params.must_equal :ca
+    end
+
+    it 'returns nil if the locale is not available' do
+      I18n.available_locales = [:en, :de]
+
+      subject.detect_from_params.must_equal nil
+    end
+  end
+
+  describe 'detect_from_session' do
+    it 'returns the locale from the session' do
+      subject.detect_from_session.must_equal :ca
+    end
+
+    it 'returns nil if the locale is not available' do
+      I18n.available_locales = [:en, :de]
+
+      subject.detect_from_params.must_equal nil
+    end
+  end
+
+  describe 'detect_from_request' do
+    it 'returns the first available locale' do
+      subject.detect_from_request.must_equal :ca
+    end
+
+    it 'returns nil when no header' do
+      subject = LocaleDetector.new({}, {}, {})
+
+      subject.detect_from_request.must_equal nil
+    end
+
+    it 'returns nil if the locale is not available' do
+      I18n.available_locales = [:es, :ch]
+
+      subject.detect_from_request.must_equal nil
+    end
+  end
+
+  describe 'detect' do
+    it "gets the default locale if can't find anything" do
+      subject = LocaleDetector.new({}, {}, {})
+
+      subject.detect.must_equal :de
+    end
+
+    it 'gets the locale from the params' do
+      subject = LocaleDetector.new(params, {}, {})
+
+      subject.detect.must_equal :ca
+    end
+
+    it 'gets the locale from the session if params is nil' do
+      subject = LocaleDetector.new({}, session, {})
+
+      subject.detect.must_equal :ca
+    end
+
+    it 'gets the locale from the request if params and session is nil' do
+      detector = LocaleDetector.new({}, {}, request)
+
+      subject.detect.must_equal :ca
+    end
+  end
+end
diff --git a/spec/models/category_spec.rb b/spec/models/category_spec.rb
index 6e0c160..7f3bb46 100644
--- a/spec/models/category_spec.rb
+++ b/spec/models/category_spec.rb
@@ -1,9 +1,14 @@
 require 'fast_spec_helper'
 require 'friendly_id'
+require 'globalize3'
+I18n.available_locales = [:ca, :es]
+I18n.locale = :ca
+require_concern 'globalize_extensions'
 require_model 'category'
 require_uploader 'image_uploader'
 require_service 'thumbnailer'
 require_model 'illustration'
+require_model 'video'
 
 describe Category do
 
@@ -18,6 +23,16 @@
     end
   end
 
+  describe 'translations' do
+    it 'translaters setters in catalan' do
+      subject.respond_to?(:name_ca=).must_equal true
+    end
+
+    it 'translaters setters in spanish' do
+      subject.respond_to?(:name_es=).must_equal true
+    end
+  end
+
   describe 'relations' do
     it 'has many illustrations' do
       %w(illustration_ids illustration_ids= illustrations illustrations=).each do |method|
@@ -26,8 +41,10 @@
     end
 
     it 'nullifies its children when deleted' do
-      subject = Category.make!
-      child = Illustration.make!(category: subject)
+      subject = Category.make
+      subject.save!
+      child = Illustration.make(category: subject)
+      child.save!
 
       subject.destroy
 
@@ -39,13 +56,15 @@
   describe 'scopes' do
     describe 'active' do
       it 'includes active categories' do
-        @category = Category.make!(active: true)
+        @category = Category.make(active: true)
+        @category.save!
 
         Category.active.must_include @category
       end
 
       it 'does not include inactive categories' do
-        @category = Category.make!(active: false)
+        @category = Category.make(active: false)
+        @category.save!
 
         Category.active.wont_include @category
       end
diff --git a/spec/models/concerns/globalize_extenstions_spec.rb b/spec/models/concerns/globalize_extenstions_spec.rb
new file mode 100644
index 0000000..733ce9b
--- /dev/null
+++ b/spec/models/concerns/globalize_extenstions_spec.rb
@@ -0,0 +1,51 @@
+require 'fast_spec_helper'
+require 'mocha'
+require 'globalize'
+require_concern 'globalize_extensions'
+
+class TestGlobalizeExtensions
+  include GlobalizeExtensions
+
+  def self.translated_attribute_names
+    ['name', 'description']
+  end
+
+  translate_accessors_in :ca, :es
+end
+
+describe GlobalizeExtensions do
+  subject { TestGlobalizeExtensions.new }
+
+  describe 'translate_setters_in' do
+    it 'define a setter for each translated attribute and locale' do
+      subject.respond_to?(:name_ca=).must_equal true
+      subject.respond_to?(:name_es=).must_equal true
+      subject.respond_to?(:description_ca=).must_equal true
+      subject.respond_to?(:description_es=).must_equal true
+    end
+
+    it 'defines a getter using Globalize to get the value in a given locale' do
+      Globalize.expects(:with_locale).with(:ca)
+
+      subject.name_ca
+    end
+
+    it 'defines a getter to get the translated value ' do
+      subject.expects(:name).returns('caca')
+
+      subject.name_ca.must_equal 'caca'
+    end
+
+    it 'defines a setter using Globalize to set the value in a given locale' do
+      Globalize.expects(:with_locale).with(:ca)
+
+      subject.name_ca = 'caca'
+    end
+
+    it 'defines a setter to call the original setter' do
+      subject.expects(:name=).with('caca')
+
+      subject.name_ca = 'caca'
+    end
+  end
+end
diff --git a/spec/models/illustration_spec.rb b/spec/models/illustration_spec.rb
index 21532ce..f1b063e 100644
--- a/spec/models/illustration_spec.rb
+++ b/spec/models/illustration_spec.rb
@@ -1,9 +1,13 @@
-require_relative '../fast_spec_helper'
+require 'fast_spec_helper'
+require 'friendly_id'
+require 'globalize3'
+I18n.available_locales = [:ca, :es]
+I18n.locale = :ca
+require_concern 'globalize_extensions'
+require_model 'category'
 require_uploader 'image_uploader'
 require_service 'thumbnailer'
-require 'friendly_id'
 require_model 'illustration'
-require_model 'category'
 
 describe Illustration do
   subject { Illustration.new }
@@ -53,19 +57,47 @@
   describe 'scopes' do
     describe 'by_category' do
       it 'includes illustrations from a given category' do
-        category = Category.make!
-        illustration = Illustration.make!(category: category)
+        category = Category.make
+        category.save!
+        illustration = Illustration.make(category: category)
+        illustration.save!
 
         Illustration.by_category(category).must_include illustration
       end
 
       it 'does not include illustrations from a other categoris' do
-        category = Category.make!
-        another_category = Category.make!
-        illustration = Illustration.make!(category: another_category)
+        another_category = Category.make
+        another_category.save!
+        category = Category.make
+        category.save!
+        illustration = Illustration.make(category: another_category)
+        illustration.save!
 
         Illustration.by_category(category).wont_include illustration
       end
     end
   end
+
+  describe 'translations' do
+    it 'translaters setters in catalan' do
+      subject.respond_to?(:name_ca=).must_equal true
+      subject.respond_to?(:description_ca=).must_equal true
+    end
+
+    it 'translaters setters in spanish' do
+      subject.respond_to?(:name_es=).must_equal true
+      subject.respond_to?(:description_es=).must_equal true
+    end
+  end
+
+  describe 'set_friendly_id' do
+    it 'sets the slug in every available locale' do
+      illustration = Illustration.new(name_ca: 'catalan', name_es: 'spanish')
+
+      illustration.set_friendly_id
+
+      illustration.slug_ca.must_equal 'catalan'
+      illustration.slug_es.must_equal 'spanish'
+    end
+  end
 end
diff --git a/spec/models/video_spec.rb b/spec/models/video_spec.rb
index 4853b4a..ace837a 100644
--- a/spec/models/video_spec.rb
+++ b/spec/models/video_spec.rb
@@ -1,5 +1,10 @@
 require 'fast_spec_helper'
+require 'friendly_id'
+require 'globalize3'
+require_concern 'globalize_extensions'
 require_model 'category'
+require_uploader 'image_uploader'
+require_service 'thumbnailer'
 require_model 'video'
 
 describe Video do
@@ -35,4 +40,16 @@
       end
     end
   end
+
+  describe 'translations' do
+    it 'translaters setters in catalan' do
+      subject.respond_to?(:name_ca=).must_equal true
+      subject.respond_to?(:description_ca=).must_equal true
+    end
+
+    it 'translaters setters in spanish' do
+      subject.respond_to?(:name_es=).must_equal true
+      subject.respond_to?(:description_es=).must_equal true
+    end
+  end
 end