<?xml version="1.0" encoding="UTF-8"?>
-<feed xml:lang="en-US" xmlns="http://www.w3.org/2005/Atom"
+<feed xml:lang="<%= Gettext.language_tag() %>" xmlns="http://www.w3.org/2005/Atom"
xmlns:thr="http://purl.org/syndication/thread/1.0"
xmlns:georss="http://www.georss.org/georss"
xmlns:activity="http://activitystrea.ms/spec/1.0/"