Index: Babel.class.php
===================================================================
--- Babel.class.php	(revision 98500)
+++ Babel.class.php	(working copy)
@@ -19,6 +19,7 @@
 	 * @return string: Babel tower.
 	 */
 	public static function Render( $parser ) {
+		global $wgBabelUseUserLanguage;
 		$parameters = func_get_args();
 		array_shift( $parameters );
 		self::$title = $parser->getTitle();
@@ -56,7 +57,13 @@
 			}
 		}
 
-		$top = wfMessage( 'babel', self::$title->getDBkey() )->inContentLanguage();	// TODO: allow user language
+		$top = wfMessage( 'babel', self::$title->getDBkey() )->inContentLanguage();
+		if ( $wgBabelUseUserLanguage ) {
+			$top = $top->inLanguage( $parser->getOptions()->getUserLangObj() );
+		} else {
+			$top = $top->inContentLanguage();
+		}
+
 		if ( $top->isDisabled() ) {
 			$top = '';
 		} else {
@@ -67,7 +74,13 @@
 			}
 			$top = '! class="mw-babel-header" | ' . $top;
 		}
-		$footer = wfMessage( 'babel-footer', self::$title->getDBkey() )->inContentLanguage();	// TODO: allow user language
+		$footer = wfMessage( 'babel-footer', self::$title->getDBkey() );
+		if ( $wgBabelUseUserLanguage ) {
+			$footer = $footer->inLanguage( $parser->getOptions()->getUserLangObj() );
+		} else {
+			$footer = $footer->inContentLanguage();
+		}
+
 		if ( $footer->isDisabled() ) {
 			$footer = '';
 		} else {
Index: Babel.php
===================================================================
--- Babel.php	(revision 98500)
+++ Babel.php	(working copy)
@@ -67,6 +67,9 @@
 $wgBabelMainCategory = '%code%';
 // Default level.
 $wgBabelDefaultLevel = 'N';
+// Use the viewing user's language for babel box header's and footer's
+// May fragment parser cache, but otherwise shouldn't cause problems
+$wgBabelUseUserLanguage = false;
 // A boolean (true or false) indicating whether ISO 639-3 codes should be preferred over ISO 639-1 codes.
 $wgBabelPreferISO639_3 = false; // Not yet used.