diff --git a/Changes.md b/Changes.md
index b5d10599..b35c79a3 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,3 +1,11 @@
+2.10.0
+-----------
+
+- I18n for web UI.  Please submit translations of `web/locales/en.yml` for
+your own language. [#811]
+- 'sinatra', 'slim' and 'i18n' are now gem dependencies for Sidekiq.
+
+
 2.9.0
 -----------
 
diff --git a/lib/sidekiq/version.rb b/lib/sidekiq/version.rb
index 81499b20..ef471443 100644
--- a/lib/sidekiq/version.rb
+++ b/lib/sidekiq/version.rb
@@ -1,3 +1,3 @@
 module Sidekiq
-  VERSION = "2.9.0"
+  VERSION = "2.10.0"
 end
diff --git a/lib/sidekiq/web.rb b/lib/sidekiq/web.rb
index 442b6853..a9db8776 100644
--- a/lib/sidekiq/web.rb
+++ b/lib/sidekiq/web.rb
@@ -1,18 +1,28 @@
 require 'sinatra/base'
 require 'slim'
 require 'sidekiq/paginator'
+require 'i18n'
 
 module Sidekiq
   class Web < Sinatra::Base
     include Sidekiq::Paginator
 
     dir = File.expand_path(File.dirname(__FILE__) + "/../../web")
+    I18n.load_path += Dir[File.join(dir, 'locales', '*.yml').to_s]
+
     set :public_folder, "#{dir}/assets"
     set :views,  "#{dir}/views"
     set :root, "#{dir}/public"
     set :slim, :pretty => true
 
     helpers do
+      def get_locale
+        (request.env["HTTP_ACCEPT_LANGUAGE"] || 'en')[0,2]
+      end
+
+      def t(msg, options={})
+        I18n.t(msg, options.merge(:locale => get_locale))
+      end
 
       def reset_worker_list
         Sidekiq.redis do |conn|
diff --git a/sidekiq.gemspec b/sidekiq.gemspec
index 7b2ab584..f9092a8f 100644
--- a/sidekiq.gemspec
+++ b/sidekiq.gemspec
@@ -19,9 +19,10 @@ Gem::Specification.new do |gem|
   gem.add_dependency                  'connection_pool', '~> 1.0'
   gem.add_dependency                  'celluloid', '~> 0.12.0'
   gem.add_dependency                  'multi_json', '~> 1'
+  gem.add_dependency                  'sinatra'
+  gem.add_dependency                  'slim'
+  gem.add_dependency                  'i18n'
   gem.add_development_dependency      'minitest', '~> 4'
-  gem.add_development_dependency      'sinatra'
-  gem.add_development_dependency      'slim'
   gem.add_development_dependency      'rake'
   gem.add_development_dependency      'actionmailer', '~> 3'
   gem.add_development_dependency      'activerecord', '~> 3'
diff --git a/web/locales/en.yml b/web/locales/en.yml
new file mode 100644
index 00000000..dc73cf8c
--- /dev/null
+++ b/web/locales/en.yml
@@ -0,0 +1,58 @@
+en:
+  Dashboard: Dashboard
+  Status: Status
+  Time: Time
+  Namespace: Namespace
+  Realtime: Real-time
+  History: History
+  Busy: Busy
+  Processed: Processed
+  Failed: Failed
+  Scheduled: Scheduled
+  Retries: Retries
+  Enqueued: Enqueued
+  Worker: Worker
+  Workers: Workers
+  LivePoll: Live Poll
+  StopPolling: Stop Polling
+  Queue: Queue
+  Class: Class
+  Job: Job
+  Arguments: Arguments
+  Started: Started
+  ShowAll: Show All
+  CurrentMessagesInQueue: "Current messages in <span class='title'>%{queue}</span>"
+  Delete: Delete
+  AreYouSureDeleteJob: Are you sure you want to delete this job?
+  AreYouSureDeleteQueue: Are you sure you want to delete the %{queue} queue?
+  Queues: Queues
+  Size: Size
+  Actions: Actions
+  NextRetry: Next Retry
+  RetryCount: Retry Count
+  RetryNow: Retry Now
+  LastRetry: Last Retry
+  OriginallyFailed: Originally Failed
+  AreYouSure: Are you sure?
+  DeleteAll: Delete All
+  RetryAll: Retry All
+  NoRetriesFound: No retries were found
+  Error: Error
+  ErrorClass: Error Class
+  ErrorMessage: Error Message
+  ErrorBacktrace: Error Backtrace
+  GoBack: ← Back
+  NoScheduledFound: No scheduled jobs were found
+  When: When
+  ScheduledJobs: Scheduled Jobs
+  idle: idle
+  active: active
+  Version: Version
+  Connections: Connections
+  MemoryUsage: Memory Usage
+  PeakMemoryUsage: Peak Memory Usage
+  Uptime: Uptime (days)
+  OneWeek: 1 week
+  OneMonth: 1 month
+  ThreeMonths: 3 months
+  SixMonths: 6 months
diff --git a/web/views/_nav.slim b/web/views/_nav.slim
old mode 100755
new mode 100644
index cc8d22a2..69d3ed1e
--- a/web/views/_nav.slim
+++ b/web/views/_nav.slim
@@ -6,7 +6,7 @@
       - tabs.each do |title, url|
         - if url == ''
           li class="#{(current_path == url) ? 'active':''}"
-            a href='#{{root_path}}#{{url}}' #{title}
+            a href='#{{root_path}}#{{url}}' = t(title)
         - else
           li class="#{(current_path =~ Regexp.new(url)) ? 'active':''}"
-            a href='#{{root_path}}#{{url}}' #{title}
+            a href='#{{root_path}}#{{url}}' = t(title)
diff --git a/web/views/_paging.slim b/web/views/_paging.slim
old mode 100755
new mode 100644
diff --git a/web/views/_status.slim b/web/views/_status.slim
old mode 100755
new mode 100644
index f7dd0dd2..4bba99ef
--- a/web/views/_status.slim
+++ b/web/views/_status.slim
@@ -1,3 +1,3 @@
 span.status
   i class="status-sprite status-#{current_status}"
-  == current_status
+  == t(current_status)
diff --git a/web/views/_summary.slim b/web/views/_summary.slim
old mode 100755
new mode 100644
index 7cee24f6..0b885151
--- a/web/views/_summary.slim
+++ b/web/views/_summary.slim
@@ -1,19 +1,19 @@
 ul.unstyled.summary
   li.processed
     span.count #{number_with_delimiter(stats.processed)}
-    span.desc  Processed
+    span.desc = t('Processed')
   li.failed
     span.count #{number_with_delimiter(stats.failed)}
-    span.desc  Failed
+    span.desc = t('Failed')
   li.busy
     span.count #{number_with_delimiter(workers.size)}
-    span.desc  Busy
+    span.desc = t('Busy')
   li.scheduled
     span.count #{number_with_delimiter(stats.scheduled_size)}
-    span.desc  Scheduled
+    span.desc = t('Scheduled')
   li.retries
     span.count #{number_with_delimiter(stats.retry_size)}
-    span.desc  Retries
+    span.desc = t('Retries')
   li.enqueued
     span.count #{number_with_delimiter(stats.enqueued)}
-    span.desc  Enqueued
+    span.desc = t('Enqueued')
diff --git a/web/views/_workers.slim b/web/views/_workers.slim
old mode 100755
new mode 100644
index 8bf8423f..d85b99e7
--- a/web/views/_workers.slim
+++ b/web/views/_workers.slim
@@ -1,10 +1,10 @@
 table class="workers table table-hover table-bordered table-striped table-white"
   thead
-    th Worker
-    th Queue
-    th Class
-    th Arguments
-    th Started
+    th = t('Worker')
+    th = t('Queue')
+    th = t('Class')
+    th = t('Arguments')
+    th = t('Started')
   - workers.each_with_index do |(worker, msg), index|
     tr
       td= worker
@@ -14,7 +14,7 @@ table class="workers table table-hover table-bordered table-striped table-white"
       td
         - if msg['payload']['args'].to_s.size > 100
           = msg['payload']['args'].inspect[0..100] + "... "
-          button data-toggle="collapse" data-target="#worker_#{index}" class="btn btn-mini" Show All
+          button data-toggle="collapse" data-target="#worker_#{index}" class="btn btn-mini" = t('ShowAll')
           .toggle[id="worker_#{index}" style="display: none;max-width: 750px;"]= msg['payload']['args']
         - else
           = msg['payload']['args']
diff --git a/web/views/dashboard.slim b/web/views/dashboard.slim
index bafc6bfd..a0a4d23d 100644
--- a/web/views/dashboard.slim
+++ b/web/views/dashboard.slim
@@ -1,20 +1,20 @@
 script type="text/javascript" src="#{{root_path}}javascripts/dashboard.js"
 
 h3
-  | Dashboard
+  = t('Dashboard')
   span.beacon
     .ring
     .dot
 
-h5 Real-time
+h5 = t('Realtime')
 #realtime
 
 h5
-  span.history-heading History
-  a href="#{{root_path}}?days=7" class="history-graph #{{"active" if params[:days] == "7"}}" 1 week
-  a href="#{{root_path}}" class="history-graph #{{"active" if params[:days].nil? || params[:days] == "30"}}" 1 month
-  a href="#{{root_path}}?days=90" class="history-graph #{{"active" if params[:days] == "90"}}" 3 month
-  a href="#{{root_path}}?days=180" class="history-graph #{{"active" if params[:days] == "180"}}" 6 month
+  span.history-heading = t('History')
+  a href="#{{root_path}}?days=7" class="history-graph #{{"active" if params[:days] == "7"}}" = t('OneWeek')
+  a href="#{{root_path}}" class="history-graph #{{"active" if params[:days].nil? || params[:days] == "30"}}" = t('OneMonth')
+  a href="#{{root_path}}?days=90" class="history-graph #{{"active" if params[:days] == "90"}}" = t('ThreeMonths')
+  a href="#{{root_path}}?days=180" class="history-graph #{{"active" if params[:days] == "180"}}" = t('SixMonths')
 #history data-processed="#{Sidekiq.dump_json(@processed_history)}" data-failed="#{Sidekiq.dump_json(@failed_history)}" data-update-url="#{{root_path}}dashboard/stats"
 
 br
@@ -23,24 +23,24 @@ h5 Redis
 - if @redis_info.fetch("redis_version", nil)
   .stat
     h3.redis_version= @redis_info.fetch("redis_version")
-    p Version
+    p = t('Version')
 
 - if @redis_info.fetch("uptime_in_days", nil)
   .stat
     h3.uptime_in_days= @redis_info.fetch("uptime_in_days")
-    p Uptime (days)
+    p = t('Uptime')
 
 - if @redis_info.fetch("connected_clients", nil)
   .stat
     h3.connected_clients= @redis_info.fetch("connected_clients")
-    p Connections
+    p = t('Connections')
 
 - if @redis_info.fetch("used_memory_human", nil)
   .stat
     h3.used_memory_human= @redis_info.fetch("used_memory_human")
-    p Memory Usage
+    p = t('MemoryUsage')
 
 - if @redis_info.fetch("used_memory_peak_human", nil)
   .stat
     h3.used_memory_peak_human= @redis_info.fetch("used_memory_peak_human")
-    p Peak Memory Usage
\ No newline at end of file
+    p = t('PeakMemoryUsage')
diff --git a/web/views/index.slim b/web/views/index.slim
old mode 100755
new mode 100644
index af780472..3078673b
--- a/web/views/index.slim
+++ b/web/views/index.slim
@@ -1,10 +1,10 @@
 .row.header
   .span7
-    h3 Workers
+    h3 = t('Workers')
 
 == slim :_workers
 - if workers.size > 0
   .row
     .span2.pull-right
       form action="#{root_path}reset" method="post"
-        button.btn.btn-primary.btn-block type="submit" title="If you kill -9 Sidekiq, this table can fill up with old data." Clear Worker List
+        button.btn.btn-primary.btn-block type="submit" title="#{t('Kill9Warning')}" = t('ClearWorkerList')
diff --git a/web/views/layout.slim b/web/views/layout.slim
old mode 100755
new mode 100644
index 924e6446..7ae909db
--- a/web/views/layout.slim
+++ b/web/views/layout.slim
@@ -23,26 +23,26 @@ html
             li
               p.navbar-text Redis: #{location}
             li
-              p.navbar-text Time: #{Time.now.utc.strftime('%H:%M:%S UTC')}
+              p.navbar-text #{t('Time')}: #{Time.now.utc.strftime('%H:%M:%S UTC')}
             - if namespace
               li
-                p.navbar-text Namespace: #{namespace}
+                p.navbar-text #{t('Namespace')}: #{namespace}
 
     #page
       .container
         .row
           .span2.summary_bar
             h4
-              span.title Status
+              span.title = t('Status')
               == slim :_status
             == slim :_summary
             - unless current_path == ''
               .row
                 .span2
                   - if params[:poll]
-                    a#live-poll.btn.btn-block.btn-primary.active href='#{{root_path}}#{{current_path}}' Stop Polling
+                    a#live-poll.btn.btn-block.btn-primary.active href='#{{root_path}}#{{current_path}}' = t('StopPolling')
                   - else
-                    a#live-poll.btn.btn-block.btn-primary href='#{{root_path}}#{{current_path}}?poll=true' Live Poll
+                    a#live-poll.btn.btn-block.btn-primary href='#{{root_path}}#{{current_path}}?poll=true' = t('LivePoll')
 
           .span10
             == yield
diff --git a/web/views/queue.slim b/web/views/queue.slim
old mode 100755
new mode 100644
index af1b96f5..715c21ec
--- a/web/views/queue.slim
+++ b/web/views/queue.slim
@@ -1,15 +1,14 @@
 header.row
   .span5
     h3
-      | Current messages in 
-      span.title #{@name}
+      == t('CurrentMessagesInQueue', :queue => @name)
   .span4
     == slim :_paging, :locals => { :url => "#{root_path}queues/#{@name}" }
 
 table class="queue table table-hover table-bordered table-striped"
   thead
-    th Class
-    th Arguments
+    th = t('Class')
+    th = t('Arguments')
     th
   - @messages.each_with_index do |msg, index|
     tr
@@ -17,12 +16,12 @@ table class="queue table table-hover table-bordered table-striped"
       td
         - if msg['args'] and msg['args'].to_s.size > 100
           = msg['args'].inspect[0..100] + "... "
-          button data-toggle="collapse" data-target="#worker_#{index}" class="btn btn-mini" Show All
+          button data-toggle="collapse" data-target="#worker_#{index}" class="btn btn-mini" = t('ShowAll')
           .toggle[id="worker_#{index}" style="display: none;"]= msg['args']
         - else
           = msg['args']
       td
         form action="#{root_path}queues/#{@name}/delete" method="post"
           input name="key_val" value="#{Sidekiq.dump_json(msg)}" type="hidden"
-          input.btn.btn-danger.btn-mini type="submit" name="delete" value="Delete" data-confirm="Are you sure you want to delete this job?"
+          input.btn.btn-danger.btn-mini type="submit" name="delete" value="#{t('Delete')}" data-confirm="#{t('AreYouSure')}"
 == slim :_paging, :locals => { :url => "#{root_path}queues/#{@name}" }
diff --git a/web/views/queues.slim b/web/views/queues.slim
old mode 100755
new mode 100644
index f9f4f8ef..1b930213
--- a/web/views/queues.slim
+++ b/web/views/queues.slim
@@ -1,10 +1,10 @@
-h3 Queues
+h3 = t('Queues')
 
 table class="queues table table-hover table-bordered table-striped table-white"
   thead
-    th Queue
-    th Size
-    th Actions
+    th = t('Queue')
+    th = t('Size')
+    th = t('Actions')
   - @queues.each do |queue, size|
     tr
       td
@@ -12,4 +12,4 @@ table class="queues table table-hover table-bordered table-striped table-white"
       td= number_with_delimiter(size)
       td width="20%"
         form action="#{root_path}queues/#{queue}" method="post"
-          input.btn.btn-danger.btn-small type="submit" name="delete" value="Delete" data-confirm="Are you sure you want to delete the #{queue} queue?"
\ No newline at end of file
+          input.btn.btn-danger.btn-small type="submit" name="delete" value="#{t('Delete')}" data-confirm="#{t('AreYouSureDeleteQueue', :queue => queue)}"
diff --git a/web/views/retries.slim b/web/views/retries.slim
old mode 100755
new mode 100644
index 2c295b9a..44649985
--- a/web/views/retries.slim
+++ b/web/views/retries.slim
@@ -1,6 +1,6 @@
 header.row
   .span5
-    h3 Retries
+    h3 = t('Retries')
   .span4
     - if @retries.size > 0
       == slim :_paging, :locals => { :url => "#{root_path}retries" }
@@ -12,11 +12,11 @@ header.row
       tr
         th width="20px"
           input type="checkbox" class="check_all"
-        th width="25%" Next Retry
-        th width="11%" Retry count
-        th Queue
-        th Worker
-        th Args
+        th width="25%" = t('NextRetry')
+        th width="11%" = t('RetryCount')
+        th = t('Queue')
+        th = t('Worker')
+        th = t('Arguments')
       - @retries.each do |msg, score|
         tr
           td
@@ -28,13 +28,13 @@ header.row
             a href="#{root_path}queues/#{msg['queue']}" #{msg['queue']}
           td= msg['class']
           td= display_args(msg['args'])
-    input.btn.btn-primary.btn-small.pull-left type="submit" name="retry" value="Retry Now"
-    input.btn.btn-danger.btn-small.pull-left type="submit" name="delete" value="Delete"
+    input.btn.btn-primary.btn-small.pull-left type="submit" name="retry" value="#{t('RetryNow')}"
+    input.btn.btn-danger.btn-small.pull-left type="submit" name="delete" value="#{t('Delete')}"
 
   form action="#{root_path}retries/all/delete" method="post"
-    input.btn.btn-danger.btn-small.pull-right type="submit" name="delete" value="Delete All" data-confirm="Are you sure?"
+    input.btn.btn-danger.btn-small.pull-right type="submit" name="delete" value="#{t('DeleteAll')}" data-confirm="#{t('AreYouSure')}"
   form action="#{root_path}retries/all/retry" method="post"
-    input.btn.btn-danger.btn-small.pull-right type="submit" name="retry" value="Retry All" data-confirm="Are you sure?"
+    input.btn.btn-danger.btn-small.pull-right type="submit" name="retry" value="#{t('RetryAll')}" data-confirm="#{t('AreYouSure')}"
 
 - else
-  .alert.alert-success No retries were found
+  .alert.alert-success = t('NoRetriesFound')
diff --git a/web/views/retry.slim b/web/views/retry.slim
old mode 100755
new mode 100644
index a8842d43..e334b8b8
--- a/web/views/retry.slim
+++ b/web/views/retry.slim
@@ -1,55 +1,55 @@
 header
-  h3 Job
+  h3 = t('Job')
 
 table class="retry table table-bordered table-striped"
   tbody
     tr
-      th Queue
+      th = t('Queue')
       td
         a href="#{root_path}queues/#{@retry['queue']}" #{@retry['queue']}
     tr
-      th Job Class
+      th = t('Class')
       td
         code= @retry['class']
     tr
-      th Job Arguments
+      th = t('Arguments')
       td
         code= display_args(@retry['args'], 1000)
     tr
-      th Job ID
+      th JID
       td
         code= @retry.jid
     - if @retry['retry_count'] > 0
       tr
-        th Retry Count
+        th = t('RetryCount')
         td= @retry['retry_count']
       tr
-        th Last Retry
+        th = t('LastRetry')
         td== relative_time(@retry['retried_at'].is_a?(Numeric) ? Time.at(@retry['retried_at']) : Time.parse(@retry['retried_at']))
     - else
       tr
-        th Originally Failed
+        th = t('OriginallyFailed')
         td== relative_time(@retry['failed_at'].is_a?(Numeric) ? Time.at(@retry['failed_at']) : Time.parse(@retry['failed_at']))
     tr
-      th Next Retry
+      th = t('NextRetry')
       td== relative_time(Time.at(@retry.score))
 
-h3 Error
+h3 = t('Error')
 table class="error table table-bordered table-striped"
   tbody
     tr
-      th Error Class
+      th = t('ErrorClass')
       td
         code= @retry['error_class']
     tr
-      th Error Message
+      th = t('ErrorMessage')
       td= @retry['error_message']
     - if !@retry['error_backtrace'].nil?
       tr
-        th Error Backtrace
+        th = t('ErrorBacktrace')
         td
           code== @retry['error_backtrace'].join("<br/>")
 form.form-horizontal action="#{root_path}retries/#{job_params(@retry, @retry.score)}" method="post"
-  a.btn href="#{root_path}retries" ← Back
-  input.btn.btn-primary type="submit" name="retry" value="Retry Now"
-  input.btn.btn-danger type="submit" name="delete" value="Delete"
+  a.btn href="#{root_path}retries" = t('GoBack')
+  input.btn.btn-primary type="submit" name="retry" value="#{t('RetryNow')}"
+  input.btn.btn-danger type="submit" name="delete" value="#{t('Delete')}"
diff --git a/web/views/scheduled.slim b/web/views/scheduled.slim
old mode 100755
new mode 100644
index 66931acd..a390c1f4
--- a/web/views/scheduled.slim
+++ b/web/views/scheduled.slim
@@ -1,6 +1,6 @@
 header.row
   .span5
-    h3 Scheduled Jobs
+    h3 = t('ScheduledJobs')
   .span4
     - if @scheduled.size > 0
       == slim :_paging, :locals => { :url => "#{root_path}scheduled" }
@@ -12,10 +12,10 @@ header.row
       thead
         th width="20px"
           input type="checkbox" class="check_all"
-        th width="25%" When
-        th width="10%" Queue
-        th Worker
-        th Args
+        th width="25%" = t('When')
+        th width="10%" = t('Queue')
+        th = t('Worker')
+        th = t('Arguments')
       - @scheduled.each do |msg, score|
         tr
           td
@@ -25,6 +25,6 @@ header.row
             a href="#{root_path}queues/#{msg['queue']}" #{msg['queue']}
           td= msg['class']
           td= display_args(msg['args'])
-    input.btn.btn-danger.pull-right type="submit" name="delete" value="Delete"
+    input.btn.btn-danger.pull-right type="submit" name="delete" value="#{t('Delete')}"
 - else
-  .alert.alert-success No scheduled jobs were found
+  .alert.alert-success = t('NoScheduledFound')