diff --git a/class.tx_jmrecaptcha.php b/class.tx_jmrecaptcha.php
index 3f14470..df70edc 100644
--- a/class.tx_jmrecaptcha.php
+++ b/class.tx_jmrecaptcha.php
@@ -38,6 +38,26 @@ class tx_jmrecaptcha extends \TYPO3\CMS\Frontend\Plugin\AbstractPlugin {
 
 	public $conf;
 
+	/**
+	 * List of valid parameters of the no-CAPTCHA variant
+	 * @see https://developers.google.com/recaptcha/docs/display#render_param
+	 *
+	 * @var array
+	 */
+	private $validNoCaptchaParameters = array(
+		'sitekey', 'theme', 'type', 'size', 'tabindex', 'callback', 'expired-callback'
+	);
+
+	/**
+	 * Mapping of conf to no-CAPTCHA parameters
+	 *
+	 * @var array
+	 */
+	private $conf2NoCaptchaParametersMapping = array(
+		'public_key' => 'sitekey',
+		'expired_callback' => 'expired-callback'
+	);
+
 	/**
 	 * @var \TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController
 	 */
@@ -79,11 +99,36 @@ protected function initConfiguration() {
 	 * @return string
 	 */
 	protected function renderNoCaptcha() {
-		$content = '<script type="text/javascript" src="' . htmlspecialchars($this->conf['server']) . '.js?hl=' . htmlspecialchars($this->conf['lang']) . '"></script>';
-		$content .= '<div class="g-recaptcha" data-sitekey="' . htmlspecialchars($this->conf['public_key']) . '" data-theme="' . htmlspecialchars($this->conf['theme']) . '"></div>';
+		$language = $this->getLanguageCode(null);
+		$languageParameter = '';
+		if (!empty($language)) {
+			$languageParameter = 'hl=' . $language;
+		}
+
+		$content = '<script type="text/javascript" src="' . htmlspecialchars($this->conf['server'] . '.js?' . $languageParameter) . '"></script>';
+		$content .= '<div class="g-recaptcha"' . $this->getNoCaptchaParameters() . '></div>';
 		return $content;
 	}
 
+	/**
+	 * Get all available parameters as collected data-attributes for no-CAPTCHA variant
+	 * @return string $noCaptchaParameters
+	 */
+	protected function getNoCaptchaParameters() {
+		$noCaptchaParameters = ' ';
+
+		foreach ($this->conf as $parameter => $value) {
+			if (!empty($value)) {
+				$parameter = isset($this->conf2NoCaptchaParametersMapping[$parameter]) ? $this->conf2NoCaptchaParametersMapping[$parameter] : $parameter;
+				if (in_array($parameter, $this->validNoCaptchaParameters)) {
+					$noCaptchaParameters .= 'data-' . $parameter . '="' . htmlspecialchars($value) . '" ';
+				}
+			}
+		}
+
+		return $noCaptchaParameters;
+	}
+
 	/**
 	 * @param $error
 	 * @return string
@@ -101,7 +146,7 @@ protected function renderReCaptcha($error) {
 
 		// Default settings
 		$recaptchaOptions = array(
-			'lang' => self::jsQuote('en'),
+			'lang' => self::jsQuote($this->getLanguageCode()),
 		);
 
 		// Theme
@@ -119,15 +164,6 @@ protected function renderReCaptcha($error) {
 			$recaptchaOptions['custom_theme_widget'] = self::jsQuote($this->conf['custom_theme_widget']);
 		}
 
-		// Language detection
-		if (!empty($this->conf['lang'])) {
-			// language from plugin configuration
-			$recaptchaOptions['lang'] = self::jsQuote($this->conf['lang']);
-		} elseif (!empty($this->typoscriptFrontendController->tmpl->setup['config.']['language'])) {
-			// automatic language detection (TYPO3 settings)
-			$recaptchaOptions['lang'] = self::jsQuote($this->typoscriptFrontendController->tmpl->setup['config.']['language']);
-		}
-
 		// Custom translations
 		$customTranslations = array();
 
@@ -168,6 +204,29 @@ protected static function jsQuote($value) {
 		return '\'' . addslashes((string)$value) . '\'';
 	}
 
+	/**
+	 * Get the language code
+	 *
+	 * Get from extension configuration first, fallback to TYPO3 setting config.language.
+	 *
+	 * @return string
+	 */
+	protected function getLanguageCode($fallback = 'en') {
+		$languageCode = '';
+
+		if (!empty($fallback)) {
+			$languageCode = $fallback;
+		}
+		if (!empty($this->conf['lang'])) {
+			// language from plugin configuration
+			$languageCode = $this->conf['lang'];
+		} elseif (!empty($this->typoscriptFrontendController->tmpl->setup['config.']['language'])) {
+			// automatic language detection (TYPO3 settings)
+			$languageCode = $this->typoscriptFrontendController->tmpl->setup['config.']['language'];
+		}
+		return $languageCode;
+	}
+
 	/**
 	 * Validate reCAPTCHA challenge/response
 	 *
diff --git a/ext_typoscript_constants.txt b/ext_typoscript_constants.txt
index fa1f6f8..535c5d5 100644
--- a/ext_typoscript_constants.txt
+++ b/ext_typoscript_constants.txt
@@ -21,12 +21,24 @@ plugin.tx_jmrecaptcha {
 	# cat=plugin.recaptcha/enable/07; type=boolean; label= Force SSL: Force use of SSL (api_server_secure)
 	use_ssl = 0
 
-	# cat=plugin.recaptcha//08; type=options[light,dark,red,white,blackglass,clean,custom]; label= reCAPTCHA Theme: Predefined reCAPTCHA themes (dark, light only for NoCaptcha)
+	# cat=plugin.recaptcha//08; type=options[light,dark,red,white,blackglass,clean,custom]; label= reCAPTCHA Theme: Predefined reCAPTCHA themes (light, dark only for NoCaptcha)
 	theme =
 
-	# cat=plugin.recaptcha//09; type=int+; label= reCAPTCHA TabIndex: TabIndex of reCAPTCHA field
+	# cat=plugin.recaptcha//09; type=options[image,audio]; label= reCAPTCHA Fallback type: Optional. The type of CAPTCHA to serve.
+	type = image
+
+	# cat=plugin.recaptcha//10; type=options[normal,compact]; label= reCAPTCHA Size: Optional. The size of the widget.
+	size = normal
+
+	# cat=plugin.recaptcha//11; type=int+; label= reCAPTCHA TabIndex: Optional. The tabindex of the widget and challenge. If other elements in your page use tabindex, it should be set to make user navigation easier.
 	tabindex = 0
 
-	# cat=plugin.recaptcha//10; type=string; label= reCAPTCHA language: Language of reCAPTCHA frontend (autodetected if empty)
+	# cat=plugin.recaptcha//12; type=string; label= reCAPTCHA Callback function: Optional. The name of your callback function to be executed when the user submits a successful CAPTCHA response. The user's response, g-recaptcha-response, will be the input for your callback function.
+	callback =
+
+	# cat=plugin.recaptcha//13; type=string; label= reCAPTCHA Expire callback function: Optional. The name of your callback function to be executed when the recaptcha response expires and the user needs to solve a new CAPTCHA.
+	expired_callback =
+
+	# cat=plugin.recaptcha//14; type=string; label= reCAPTCHA language: Optional. Forces the widget to render in a specific language. Auto-detects the user's language if unspecified.
 	lang =
 }
diff --git a/ext_typoscript_setup.txt b/ext_typoscript_setup.txt
index d1ddf68..1ec3f0f 100644
--- a/ext_typoscript_setup.txt
+++ b/ext_typoscript_setup.txt
@@ -12,7 +12,11 @@ plugin.tx_jmrecaptcha {
 	use_ssl = {$plugin.tx_jmrecaptcha.use_ssl}
 
 	theme = {$plugin.tx_jmrecaptcha.theme}
+	type = {$plugin.tx_jmrecaptcha.type}
+	size = {$plugin.tx_jmrecaptcha.size}
 	tabindex = {$plugin.tx_jmrecaptcha.tabindex}
+	callback = {$plugin.tx_jmrecaptcha.callback}
+	expired_callback = {$plugin.tx_jmrecaptcha.expired_callback}
 	lang = {$plugin.tx_jmrecaptcha.lang}
 
 }