--- a/RelaxNG/publidoc.rnc	jeu. avril 21 12:02:13 2016 +0200
+++ b/RelaxNG/publidoc.rnc	jeu. avril 21 12:02:56 2016 +0200
@@ -607,7 +607,8 @@
 audio.attributes =
    media.id.attribute
  & audio.type?
-audio.type = attribute type { "music" | "voice" | "background" | "smil" }
+audio.type = attribute type { "music" | "voice" | "en" | "fr" | "background"
+ | "smil" }
 
 # ~~~~~~ video
 video = element video { video.attributes }