diff --git a/docbook/auth-server-docs/reference/en/en-US/modules/javascript-adapter.xml b/docbook/auth-server-docs/reference/en/en-US/modules/javascript-adapter.xml
index 33d62dca2d..2036afbd8a 100755
--- a/docbook/auth-server-docs/reference/en/en-US/modules/javascript-adapter.xml
+++ b/docbook/auth-server-docs/reference/en/en-US/modules/javascript-adapter.xml
@@ -210,6 +210,7 @@ new Keycloak({ url: 'http://localhost/auth', realm: 'myrealm', clientId: 'myApp'
                         <listitem>prompt - can be set to 'none' to check if the user is logged in already (if not logged in, a login form is not displayed)</listitem>
                         <listitem>loginHint - used to pre-fill the username/email field on the login form</listitem>
                         <listitem>action - if value is 'register' then user is redirected to registration page, otherwise to login page</listitem>
+                        <listitem>locale - specifies the desired locale for the UI</listitem>
                     </itemizedlist>
                 </para>
             </simplesect>
diff --git a/integration/js/src/main/resources/keycloak.js b/integration/js/src/main/resources/keycloak.js
index d189a361f8..7b378de347 100755
--- a/integration/js/src/main/resources/keycloak.js
+++ b/integration/js/src/main/resources/keycloak.js
@@ -168,6 +168,10 @@
                 url += '&scope=' + options.scope;
             }
 
+            if (options && options.locale) {
+                url += '&ui_locales=' + options.locale;
+            }
+
             return url;
         }