How to set the locale (en_US") of Magento2 by using command line.

[kmoguls]

I have installed magento 2.0.7 with CentoOS 7 / Apache 2.4.6 / PHP 7 / MariaDB 10.
After applying the Japanese locale to "Interface Locale" under Account Setting (refer the link below), I get "HTTP ERROR 500" for accessing the admin console.

Link: http://magento.stackexchange.com/questions/113847/magento-2-how-do-i-change-the-locale-of-admin-backend

I found out that the Japanese locale installation was incomplete. Consequently, I need a help for restoring the "en_US" locale by updating DB or Code (coding).

Please help me to resolve this issue by providing the steps to change the locale with using command line.
Many thanks in advance.

[veloraven]

@kmoguls
I'm closing this issue as the GitHub issue tracker is intended for technical issues only.
Please refer to the Community Forums or the Magento Stack Exchange site for technical questions.