Fixes #1234: use dash instead of underscore to separate language and country in locale id.
Fixes #1234: use dash instead of underscore to separate language and country in locale id.


jacmoe/yii2-app-basic-zurbified,jarioneto/yii2-app-rest,karoldanutama/dev-ops-yii2-app-basic,OrlandoST/yii2-app-basic,jacmoe/yii2-app-basic-zurbified,DawidMyslak/home-budget,IngridMendes/boigalera,yiisoft/yii2-app-basic,AdeAttwood/Yii2-Basic-Grunt,OrlandoST/yii2-app-basic,tigokr/intermedia_test_0,fredyns/shippingweight,wartron/yii2-app-basic-account,CanDo-com/yii2-app-basic,matperez/yii2-app-basic-with-environments,IngridMendes/boigalera,wojtonow/yii2-basic,krissss/yundou,alfredleo/yii2-app-basic,OrlandoST/instapro,novomirskoy/yii2gallery,andreybolonin/yii2-app-basic,fredyns/shippingweight,AdeAttwood/Yii2-Basic-Grunt,cbn052293/Test_Yii,novomirskoy/yii2gallery,pana1990/yii2-app-basic,AdeAttwood/Yii2-Basic-Grunt,callmez/yii2-app-wechat,dasscheman/yii2-app-basic,dasscheman/yii2-app-basic,DawidMyslak/home-budget,CanDo-com/yii2-app-basic,themccallister/yii2-app-basic,githubjeka/yii2-app-basic,aerios/dev-ops-yii2-app-basic,wojtonow/yii2-basic,Vitashev/yii2-app-basic,IngridMendes/boigalera,marianturchyn/yii2-app-basic,tiagocardosos/yii2-sample-app-urlshortener-mongo,tigokr/intermedia_test_0,hanupas/dev-ops-yii2-app-basic,tird/yii2-app-basic,adiferd/dev-ops-yii2-app-basic,OrlandoST/instapro,matperez/yii2-app-basic-with-environments,yiisoft/yii2-app-basic,githubjeka/yii2-app-basic