Index: wp-includes/js/tinymce/plugins/spellchecker/classes/GoogleSpell.php
===================================================================
--- wp-includes/js/tinymce/plugins/spellchecker/classes/GoogleSpell.php	(revision 19902)
+++ wp-includes/js/tinymce/plugins/spellchecker/classes/GoogleSpell.php	(working copy)
@@ -39,7 +39,7 @@
 		$matches = $this->_getMatches($lang, $word);
 
 		if (count($matches) > 0)
-			$sug = explode("\t", utf8_encode($this->_unhtmlentities($matches[0][4])));
+			$sug = explode("\t", $this->_unhtmlentities($matches[0][4]));
 
 		// Remove empty
 		foreach ($sug as $item) {