diff --git a/server/zanata-frontend/src/index.html b/server/zanata-frontend/src/index.html
index 1fb28d6a128..551c2c8338b 100644
--- a/server/zanata-frontend/src/index.html
+++ b/server/zanata-frontend/src/index.html
@@ -30,6 +30,7 @@
       data-links='{"loginUrl": "/login",
                    "registerUrl": "/register"
                   }'
+      data-app-locale='en-us'
     />
     <script type="application/javascript">
       window.config = document.getElementById('config').dataset
diff --git a/server/zanata-war/src/main/webapp/a/index.xhtml b/server/zanata-war/src/main/webapp/a/index.xhtml
index 9e529d62610..15f02df3a75 100644
--- a/server/zanata-war/src/main/webapp/a/index.xhtml
+++ b/server/zanata-war/src/main/webapp/a/index.xhtml
@@ -37,6 +37,7 @@
       data-links='{"loginUrl": "#{applicationConfigurationAction.getLoginUrl(request)}",
                      "registerUrl": "#{applicationConfigurationAction.registerUrl}"}'
       data-allow-register="#{allowPublicRegistration}"
+      data-app-locale="#{localeSelectorAction.getLocale()}"
     >
     </div>
     <script type="application/javascript">