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Where can I set language (based on user's cookie) globally? How to make it work in the whole application (controllers,views, etc.) ?
In documentation I found \Yii::$app->language = ''; but, where I can write my logic to change the language in right way?
Go to application configuration file frontend/main/config.php or backend/main/config.php
$config = ['language' => 'ru-RU']