Fixed language change.

app/assets/javascripts/app/controllers/_profile/language.js.coffee

@@ -38,7 +38,7 @@ class Index extends App.Controller
       id:          'preferences'
       type:        'PUT'
       url:         @apiPath + '/users/preferences'
-      data: JSON.stringify(params)
+      data:        JSON.stringify({user:params})
       processData: true
       success:     @success
       error:       @error

app/controllers/users_controller.rb

@@ -509,8 +509,8 @@ curl http://localhost/api/v1/users/preferences.json -v -u #{login}:#{password} -
       params[:user].each {|key, value|
         current_user.preferences[key.to_sym] = value
       }
-    end
       current_user.save
+    end
     render :json => { :message => 'ok' }, :status => :ok
   end
 

test/browser/prefereces_test.rb

@@ -47,6 +47,28 @@ class PreferencesTest < TestCase
             :area    => 'body',
             :value   => 'Language',
           },
+          {
+            :execute => 'select',
+            :css     => '.language_item select[name="locale"]',
+            :value   => 'Deutsch',
+          },
+          {
+            :execute => 'click',
+            :css     => '.content button[type="submit"]',
+          },
+          {
+            :execute => 'watch_for',
+            :area    => 'body',
+            :value   => 'Sprache',
+          },
+          {
+            :execute => 'reload',
+          },
+          {
+            :execute => 'watch_for',
+            :area    => 'body',
+            :value   => 'Sprache',
+          },
         ],
       },
     ]