diff --git a/Gemfile b/Gemfile
index 3b1d0ea4..01bd5af1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -80,6 +80,9 @@ gem 'cocoon'
 # as the JavaScript library
 gem 'jquery-rails'
 
+# for languages validation
+gem 'iso-639'
+
 # frontend javascripts
 source 'https://rails-assets.org' do
   # for placeholder images
diff --git a/Gemfile.lock b/Gemfile.lock
index ef102920..3de1b95d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -219,6 +219,7 @@ GEM
     i18n_data (0.7.0)
     inversion (0.12.3)
       loggability (~> 0.4)
+    iso-639 (0.2.5)
     jquery-datatables-rails (2.2.3)
       jquery-rails
       sass-rails
@@ -560,6 +561,7 @@ DEPENDENCIES
   guard-rspec (~> 4.2.8)
   haml-rails
   hoptoad_notifier (~> 2.3)
+  iso-639
   jquery-datatables-rails (~> 2.2.1)
   jquery-rails
   leaflet-rails
@@ -615,6 +617,3 @@ DEPENDENCIES
   web-console (~> 2.0)
   webmock
   whenever
-
-BUNDLED WITH
-   1.11.2
diff --git a/app/controllers/admin/programs_controller.rb b/app/controllers/admin/programs_controller.rb
index 9727f82b..ba66809f 100644
--- a/app/controllers/admin/programs_controller.rb
+++ b/app/controllers/admin/programs_controller.rb
@@ -26,7 +26,7 @@ module Admin
     private
 
     def program_params
-      params.require(:program).permit(:rating, :schedule_public, :schedule_fluid)
+      params.require(:program).permit(:rating, :schedule_public, :schedule_fluid, :languages)
     end
   end
 end
diff --git a/app/controllers/proposal_controller.rb b/app/controllers/proposal_controller.rb
index 4efe8555..b9bf3b10 100644
--- a/app/controllers/proposal_controller.rb
+++ b/app/controllers/proposal_controller.rb
@@ -21,10 +21,12 @@ class ProposalController < ApplicationController
     authorize! :new, @event
     @user = User.new
     @url = conference_program_proposal_index_path(@conference.short_title)
+    @languages = @program.languages_list
   end
 
   def edit
     @url = conference_program_proposal_path(@conference.short_title, params[:id])
+    @languages = @program.languages_list
   end
 
   def create
@@ -152,7 +154,7 @@ class ProposalController < ApplicationController
   def event_params
     params.require(:event).permit(:event_type_id, :track_id, :difficulty_level_id,
                                   :title, :subtitle, :abstract, :description,
-                                  :require_registration, :max_attendees)
+                                  :require_registration, :max_attendees, :language)
   end
 
   def user_params
diff --git a/app/models/program.rb b/app/models/program.rb
index e336be21..971f5c55 100644
--- a/app/models/program.rb
+++ b/app/models/program.rb
@@ -52,6 +52,7 @@ class Program < ActiveRecord::Base
 
   before_create :create_event_types
   before_create :create_difficulty_levels
+  validate :check_languages_format
 
   ##
   # Checcks if the program has rating enabled
@@ -83,6 +84,10 @@ class Program < ActiveRecord::Base
     (!conference.email_settings.program_schedule_public_subject.blank? && !conference.email_settings.program_schedule_public_body.blank?)
   end
 
+  def languages_list
+    self.languages.split(',').map {|l| ISO_639.find(l).english_name} if self.languages.present?
+  end
+
   private
 
   ##
@@ -113,4 +118,20 @@ class Program < ActiveRecord::Base
                                                 color: '#EF6E69')
     true
   end
+
+  ##
+  # Check if languages string has the right format. Used as validation.
+  #
+  def check_languages_format
+    return unless self.languages.present?
+    # All white spaces are removed to allow languages to be separated by ',' and ', '. The languages string without spaces is saved
+    self.languages = self.languages.delete(' ').downcase
+    errors.add(:languages, 'must be two letters separated by commas') && return unless
+    self.languages.match(/^$|(\A[a-z][a-z](,[a-z][a-z])*\z)/).present?
+    languages_array = self.languages.split(',')
+    # We check that languages are not repeated
+    errors.add(:languages, "can't be repeated") && return unless languages_array.uniq!.nil?
+    # We check if every language is a valid ISO 639-1 language
+    errors.add(:languages, 'must be ISO 639-1 valid codes') unless languages_array.select{ |x| ISO_639.find(x).nil? }.empty?
+  end
 end
diff --git a/app/views/admin/events/_proposal.html.haml b/app/views/admin/events/_proposal.html.haml
index 7d7955c5..4d8ed950 100644
--- a/app/views/admin/events/_proposal.html.haml
+++ b/app/views/admin/events/_proposal.html.haml
@@ -98,6 +98,14 @@
                                               off_text: 'No' }
           - if @event.require_registration
             = registered_text(@event)
+
+      -if @program.languages.present?
+        %tr
+          %td
+            %b Language
+          %td
+            = @event.language
+
       - if !@event.room.nil?
         %tr
           %td
diff --git a/app/views/admin/events/index.html.haml b/app/views/admin/events/index.html.haml
index e43fbfe0..f5aeea9c 100644
--- a/app/views/admin/events/index.html.haml
+++ b/app/views/admin/events/index.html.haml
@@ -22,6 +22,9 @@
           %b Submitter
         %th
           %b Speaker
+        -if @program.languages.present?
+          %th
+            %b Language
         %th
           %b Requires Registration
         %th
@@ -83,6 +86,10 @@
             - else
               Unknown speaker
 
+          -if @program.languages.present?
+            %td
+              = event.language
+
           %td.text-center{'data-order' => "#{event.require_registration}"}
             = check_box_tag @conference.short_title, event.id, event.require_registration,
               method: :patch, url: "/admin/conference/#{@conference.short_title}/program/events/#{event.id}?event[require_registration]=",
diff --git a/app/views/admin/programs/_form.html.haml b/app/views/admin/programs/_form.html.haml
index 13b1ce72..e50c8e56 100644
--- a/app/views/admin/programs/_form.html.haml
+++ b/app/views/admin/programs/_form.html.haml
@@ -4,9 +4,10 @@
       %h1 Program
 .row
   .col-md-8
-    = semantic_form_for(@program, :url => admin_conference_program_path(@conference.short_title),:html => {:multipart => true}) do |f|
+    = semantic_form_for(@program, url: admin_conference_program_path(@conference.short_title), html: {multipart: true}) do |f|
       = f.input :schedule_public, label: "Show Schedule on the home and splash page"
       = f.input :schedule_fluid, label: "Allow submitters to change their event after it is scheduled"
-      = f.input :rating, :hint => "Enter the number of different rating levels you want to have for voting on proposals. Enter 0 if you do not want to vote on proposals."
+      = f.input :rating, hint: 'Enter the number of different rating levels you want to have for voting on proposals. Enter 0 if you do not want to vote on proposals.'
+      = f.input :languages, hint: "Enter the languages allowed for events as values of #{link_to('ISO 639-1', 'http://www.loc.gov/standards/iso639-2/php/code_list.php', target: "_blank")} language codes separated with commas. The first language would be the default language. Leave it blank if you do not want to specify languages.".html_safe
       %p.text-right
-        = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}
+        = f.action :submit, as: :button, button_html: {class: 'btn btn-primary'}
diff --git a/app/views/admin/programs/show.html.haml b/app/views/admin/programs/show.html.haml
index c73f5f9b..d00d98ca 100644
--- a/app/views/admin/programs/show.html.haml
+++ b/app/views/admin/programs/show.html.haml
@@ -31,6 +31,10 @@
           Difficulty Levels:
         %dd
           = difficulty_levels(@conference)
+        %dt
+          Languages:
+        %dd
+          = @program.languages
         %dt
           Public Schedule
         %dd#schedule_public
diff --git a/app/views/proposal/_proposal_form.html.haml b/app/views/proposal/_proposal_form.html.haml
index c7f0bb16..4df88438 100644
--- a/app/views/proposal/_proposal_form.html.haml
+++ b/app/views/proposal/_proposal_form.html.haml
@@ -14,6 +14,11 @@
       data: { min_words: type.minimum_abstract_length, max_words: type.maximum_abstract_length }]},
       include_blank: false, label: 'Type', input_html: { class: 'select-help-toggle' }
 
+    - if @program.languages.present?
+      = f.input :language, as: :select,
+        collection: @languages,
+        include_blank: false, label: 'Language', input_html: { class: 'select-help-toggle' }
+
     - @conference.program.event_types.each do |event_type|
       %span{ class: 'help-block select-help-text event_event_type_id collapse', id: "#{event_type.id}-help" }
         = event_type.description
diff --git a/app/views/proposal/new.html.haml b/app/views/proposal/new.html.haml
index 37e415f7..03d246de 100644
--- a/app/views/proposal/new.html.haml
+++ b/app/views/proposal/new.html.haml
@@ -31,6 +31,11 @@
                 data: { min_words: type.minimum_abstract_length, max_words: type.maximum_abstract_length }]},
                 include_blank: false, label: 'Type', input_html: { class: 'select-help-toggle' }
 
+              - if @program.languages.present?
+                = f.input :language, as: :select,
+                  collection: @languages,
+                  include_blank: false, label: 'Language', input_html: { class: 'select-help-toggle' }
+
               - @program.event_types.each do |event_type|
                 %span{ class: 'help-block event_event_type_id collapse', id: "#{event_type.id}-help" }
                   = event_type.description
diff --git a/db/migrate/20160320220630_add_languages_to_program.rb b/db/migrate/20160320220630_add_languages_to_program.rb
new file mode 100644
index 00000000..b49c01d1
--- /dev/null
+++ b/db/migrate/20160320220630_add_languages_to_program.rb
@@ -0,0 +1,5 @@
+class AddLanguagesToProgram < ActiveRecord::Migration
+  def change
+    add_column :programs, :languages, :string
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 00e93609..2d48c4d5 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -266,6 +266,7 @@ ActiveRecord::Schema.define(version: 20160427104236) do
     t.boolean  "schedule_fluid",  default: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "languages"
   end
 
   create_table "qanswers", force: :cascade do |t|
diff --git a/spec/models/program_spec.rb b/spec/models/program_spec.rb
index 3adad84e..a743791e 100644
--- a/spec/models/program_spec.rb
+++ b/spec/models/program_spec.rb
@@ -58,4 +58,37 @@ describe Program do
       expect(conference.program.difficulty_levels.count).to eq 3
     end
   end
+
+  describe 'languages' do
+    it "is not valid if languages aren't two letters separated by commas" do
+      program.languages = 'eng, De es'
+      expect(program.valid?).to eq false
+      expect(program.errors[:languages]).to eq ['must be two letters separated by commas']
+    end
+
+    it 'is not valid if languages are repeated' do
+      program.languages = 'en,de,es,en'
+      expect(program.valid?).to eq false
+      expect(program.errors[:languages]).to eq ["can't be repeated"]
+    end
+
+    it "is not valid if languages aren't ISO 639-1 valid codes" do
+      program.languages = 'en,hh,yu,zi,oo'
+      expect(program.valid?).to eq false
+      expect(program.errors[:languages]).to eq ['must be ISO 639-1 valid codes']
+    end
+
+    it 'is valid otherwise' do
+      program.languages = 'en,De, ES, ru,el'
+      expect(program.valid?).to eq true
+    end
+  end
+
+  describe '#languages_list' do
+    it 'returns the list of readable languages' do
+      program.languages = 'en,de,fr,ru,zh'
+      expect(program.languages_list).to eq %w(English German French Russian Chinese)
+    end
+  end
+
 end
diff --git a/spec/views/admin/events/index.html.haml_spec.rb b/spec/views/admin/events/index.html.haml_spec.rb
index 353e35a8..5a252862 100644
--- a/spec/views/admin/events/index.html.haml_spec.rb
+++ b/spec/views/admin/events/index.html.haml_spec.rb
@@ -3,12 +3,13 @@ require 'spec_helper'
 describe 'admin/events/index' do
   let!(:conference) { create(:conference) }
   let!(:program) { conference.program }
-  let!(:event1) { create(:event, program: conference.program, title: 'event1') }
-  let!(:event2) { create(:event, program: conference.program, title: 'event2') }
+  let!(:event1) { create(:event, program: conference.program, title: 'event1', language: 'English') }
+  let!(:event2) { create(:event, program: conference.program, title: 'event2', language: 'German') }
 
   it 'renders all conference events' do
     assign(:conference, conference)
     assign(:program, conference.program)
+    program.languages = 'en,de'
     assign(:events, [ event1, event2 ])
     assign(:event_types, [ create(:event_type, program: conference.program), create(:event_type, program: conference.program) ])
     assign(:tracks, [ create(:track, program: conference.program), create(:track, program: conference.program) ])
@@ -20,18 +21,21 @@ describe 'admin/events/index' do
     expect(rendered).to have_selector('table thead th:nth-of-type(2)', text: 'Title')
     expect(rendered).to have_selector('table thead th:nth-of-type(3)', text: 'Submitter')
     expect(rendered).to have_selector('table thead th:nth-of-type(4)', text: 'Speaker')
-    expect(rendered).to have_selector('table thead th:nth-of-type(5)', text: 'Requires Registration')
-    expect(rendered).to have_selector('table thead th:nth-of-type(6)', text: 'Highlight')
-    expect(rendered).to have_selector('table thead th:nth-of-type(7)', text: 'Type')
-    expect(rendered).to have_selector('table thead th:nth-of-type(8)', text: 'Track')
-    expect(rendered).to have_selector('table thead th:nth-of-type(9)', text: 'Difficulty')
-    expect(rendered).to have_selector('table thead th:nth-of-type(10)', text: 'State')
+    expect(rendered).to have_selector('table thead th:nth-of-type(5)', text: 'Language')
+    expect(rendered).to have_selector('table thead th:nth-of-type(6)', text: 'Requires Registration')
+    expect(rendered).to have_selector('table thead th:nth-of-type(7)', text: 'Highlight')
+    expect(rendered).to have_selector('table thead th:nth-of-type(8)', text: 'Type')
+    expect(rendered).to have_selector('table thead th:nth-of-type(9)', text: 'Track')
+    expect(rendered).to have_selector('table thead th:nth-of-type(10)', text: 'Difficulty')
+    expect(rendered).to have_selector('table thead th:nth-of-type(11)', text: 'State')
 
     expect(conference.program.events.count).to eq 2
     expect(rendered).to have_selector('table tr:nth-of-type(1) td:nth-of-type(1)', text: event1.id)
     expect(rendered).to have_selector('table tr:nth-of-type(1) td:nth-of-type(2)', text: 'event1')
+    expect(rendered).to have_selector('table tr:nth-of-type(1) td:nth-of-type(5)', text: 'English')
 
     expect(rendered).to have_selector('table tr:nth-of-type(2) td:nth-of-type(1)', text: event2.id)
     expect(rendered).to have_selector('table tr:nth-of-type(2) td:nth-of-type(2)', text: 'event2')
+    expect(rendered).to have_selector('table tr:nth-of-type(2) td:nth-of-type(5)', text: 'German')
   end
 end
diff --git a/spec/views/admin/programs/show.html.haml_spec.rb b/spec/views/admin/programs/show.html.haml_spec.rb
index 807d8c34..ba4066d5 100644
--- a/spec/views/admin/programs/show.html.haml_spec.rb
+++ b/spec/views/admin/programs/show.html.haml_spec.rb
@@ -12,5 +12,6 @@ describe 'admin/programs/show' do
     expect(rendered).to have_css('dt', text: 'Tracks:')
     expect(rendered).to have_css('dt', text: 'Difficulty Levels:')
     expect(rendered).to have_css('dd', text: 'Easy, Medium and Hard')
+    expect(rendered).to have_css('dt', text: 'Languages:')
   end
 end