Simple project based on https://github.com/yiisoft/yii2-app-basic demonstrating multilingual features of Yii2.
git clone https://github.com/tbreuss/yii2-multilingual-demo.git
cd yii2-multilingual-demo
composer install
php yii migrate
php yii serve --port 9999
Open your favorite web browser with the url http://localhost:9999.