mediawiki-extensions-Echo/includes/formatters/EchoForeignPresentationModel.php

<?php

class EchoForeignPresentationModel extends EchoEventPresentationModel {
	public function getIconType() {
		return 'global';
	}

	public function getPrimaryLink() {
		return false;
	}

	protected function getHeaderMessageKey() {
		$data = $this->event->getExtra();
		$section = $data['section'];

		return "notification-header-{$this->type}-{$section}";
	}

	public function getHeaderMessage() {
		$msg = parent::getHeaderMessage();

		$data = $this->event->getExtra();
		$msg->params( $this->getWikiName( reset( $data['wikis'] ) ) );
		$msg->numParams( count( $data['wikis'] ) - 1 );

		return $msg;
	}

	protected function getWikiName( $wiki ) {
		$foreign = new EchoForeignNotifications( new User );
		$data = $foreign->getApiEndpoints( array( $wiki ) );
		return $data[$wiki]['title'];
	}
}