Index: typo3/sysext/indexed_search/pi/class.tx_indexedsearch.php
===================================================================
--- typo3/sysext/indexed_search/pi/class.tx_indexedsearch.php	(revision 7135)
+++ typo3/sysext/indexed_search/pi/class.tx_indexedsearch.php	(working copy)
@@ -287,7 +287,7 @@
 			),
 			'lang' => Array (
 				-1 => $this->pi_getLL('opt_lang_-1'),
-				0 => $this->pi_getLL('opt_lang_0'),
+				0 => $this->getDefaultLanguageName()
 			),
 			'desc' => Array (
 				'0' => $this->pi_getLL('opt_desc_0'),
@@ -2395,9 +2395,38 @@
 			}
 		}
 	}
+
+	/**
+	 * Obtains default language name.
+	 *
+	 * @return string
+	 */
+	protected function getDefaultLanguageName() {
+		$languageName = $this->getDefaultLanguageNameFromTSConfig();
+		if ($languageName == '') {
+			$languageName = $this->pi_getLL('opt_lang_0');
 }
+		return $languageName;
+	}
 
+	/**
+	 * Obtains default language name from TSConfig.
+	 *
+	 * @return string
+	 */
+	protected function getDefaultLanguageNameFromTSConfig() {
+		$result = '';
+		$tsConfig = $GLOBALS['TSFE']->getPagesTSconfig();
+		if (is_array($tsConfig)) {
+			if (isset($tsConfig['mod.']['SHARED.']['defaultLanguage.']['title'])) {
+				$result = $tsConfig['mod.']['SHARED.']['defaultLanguage.']['title'];
+			}
+		}
+		return $result;
+	}
+}
 
+
 if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/indexed_search/pi/class.tx_indexedsearch.php'])	{
 	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/indexed_search/pi/class.tx_indexedsearch.php']);
 }