diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,17 +1,24 @@
 # yesod-recaptcha2
 
 ~~~hs
-import Import.ReCaptcha2
+import Yesod.ReCaptcha2
 ~~~
 
 ~~~hs
 instance YesodReCaptcha App where
-    reCaptchaSiteKey = return "foo"
-    reCaptchaSecretKey = return "bar"
+    reCaptchaSiteKey = pure "foo"
+    reCaptchaSecretKey = pure "bar"
+    reCaptchaLanguage = pure Nothing
+
+    -- with specific language from https://developers.google.com/recaptcha/docs/language
+    -- reCaptchaLanguage = pure (Just "ru")
 ~~~
 
+## Append to applicative form
 
 ~~~hs
-<* reCaptcha
+buildForm :: Form MyForm
+buildForm = renderDivs $ MyForm
+  <$> areq textField "foo" Nothing
+  <* reCaptcha
 ~~~
-
diff --git a/src/Yesod/ReCaptcha2.hs b/src/Yesod/ReCaptcha2.hs
--- a/src/Yesod/ReCaptcha2.hs
+++ b/src/Yesod/ReCaptcha2.hs
@@ -7,15 +7,18 @@
 module Yesod.ReCaptcha2 (YesodReCaptcha(..), reCaptcha, mReCaptcha) where
 
 import           ClassyPrelude.Yesod
+import           Data.Text           (append)
 import           Network.HTTP.Simple
 import           Yesod.Auth
 
 -- | default key is testing. you should impl reCaptchaSiteKey and reCaptchaSecretKey
 class YesodAuth site => YesodReCaptcha site where
     reCaptchaSiteKey :: HandlerT site IO Text
-    reCaptchaSiteKey = return "6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI"
+    reCaptchaSiteKey = pure "6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI"
     reCaptchaSecretKey :: HandlerT site IO Text
-    reCaptchaSecretKey = return "6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe"
+    reCaptchaSecretKey = pure "6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe"
+    reCaptchaLanguage :: HandlerT site IO (Maybe Text)
+    reCaptchaLanguage = pure Nothing
 
 data SiteverifyResponse = SiteverifyResponse { success :: Bool }
     deriving (Eq, Ord, Read, Show, Generic, FromJSON, ToJSON)
@@ -49,7 +52,12 @@
             , fvTooltip = Nothing
             , fvId = ""
             , fvInput = do
-                    addScriptRemote "https://www.google.com/recaptcha/api.js"
+                    language <- handlerToWidget reCaptchaLanguage
+                    case language of
+                      Nothing ->
+                        addScriptRemote "https://www.google.com/recaptcha/api.js"
+                      Just language ->
+                        addScriptRemote $ append "https://www.google.com/recaptcha/api.js?hl=" language
                     siteKey <- handlerToWidget reCaptchaSiteKey
                     [whamlet|<div .g-recaptcha data-sitekey=#{siteKey}>|]
             , fvErrors = Nothing
diff --git a/yesod-recaptcha2.cabal b/yesod-recaptcha2.cabal
--- a/yesod-recaptcha2.cabal
+++ b/yesod-recaptcha2.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           yesod-recaptcha2
-version:        0.1.0.1
+version:        0.2.0
 synopsis:       yesod recaptcha2
 description:    recaptcha2 for yesod-form
 category:       Web
@@ -32,6 +32,7 @@
     , classy-prelude-yesod
     , http-conduit
     , yesod-auth
+    , text
   exposed-modules:
       Yesod.ReCaptcha2
   default-language: Haskell2010