/**
	 * Run hook to override a message keys that might need to be changed
	 * across all sites in this cluster.
	 * @param string $msgKey the Message key
	 * @return string the Message key to use
	 */
	public static function getSiteMessage( $msgKey ) {
		wfRunHooks( 'OAuthReplaceMessage', &$msgKey );
		return $msgKey;
	}

	$wgHooks['OAuthReplaceMessage'][] = function ( &$msgKey ) {
		if ( $msgKey === 'mwoauth-form-privacypolicy-link' ) {
			$msgKey = 'wikimedia-oauth-privacy-link';
		}
		return true;
	};

	$wgHooks['MessageCache::get'][] = function ( &$msgKey ) {
		if ( $msgKey === 'mwoauth-form-privacypolicy-link' ) {
			$msgKey = 'wikimedia-oauth-privacy-link';
		}
		return true;
	};