app/base/config/params.php
<?php
return [
'adminEmail' => 'admin@example.com',
'brandLabel' => 'Brand',
// List of available languages for pages, news, events etc.
// Keys must correspond to keys in UrlManager::$languages app component.
'languages' => [
'uk' => 'Українська',
'ru' => 'Русский',
'en' => 'English',
],
];