Index: wp-content/themes/twentytwelve/functions.php
===================================================================
--- wp-content/themes/twentytwelve/functions.php	(revision 21685)
+++ wp-content/themes/twentytwelve/functions.php	(working copy)
@@ -102,6 +102,9 @@
 
 	/*
 	 * Loads our special font CSS file.
+	 * 
+	 * The use of Open Sans by default is localized. For languages that use
+	 * characters not supported by the font, the font will not be used.
 	 *
  	 * To disable in a child theme, use wp_dequeue_style()
  	 * function mytheme_dequeue_fonts() {
@@ -109,8 +112,12 @@
  	 * }
 	 * add_action( 'wp_enqueue_scripts', 'mytheme_dequeue_fonts', 11 );
  	 */
-	$protocol = is_ssl() ? 'https' : 'http';
-	wp_enqueue_style( 'twentytwelve-fonts', "$protocol://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700", array(), null );
+	/* translators: If there are characters in you language, that are not
+	   supported by Open Sans, enter 'no'. Otherwise enter 'yes'. Do not translate into your own language. */
+	if ( 'yes' == _x( 'yes', 'Use Open Sans: yes or no', 'twentytwelve' ) ) {
+		$protocol = is_ssl() ? 'https' : 'http';
+		wp_enqueue_style( 'twentytwelve-fonts', "$protocol://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700", array(), null );
+	}
 
 	/*
 	 * Loads our main stylesheet.