if ( $showCacheHint ) {
$dir = $this->getContext()->getLanguage()->getDir();
- $lang = $this->getContext()->getLanguage()->getCode();
+ $lang = $this->getContext()->getLanguage()->getHtmlCode();
$outputPage->wrapWikiMsg(
"<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",