Is it possible to run applications with different locales (languages)?
This module for Xposed Framework should do the trick if your device is rooted. 


Install Xposed Installer.
Run Xposed Installer and use it to install Xposed Framework. It's a two-tap operation followed by a reboot. 
Find the App Settings module in Xposed Installer, install and enable it. Reboot device. 
Click the module in Xposed Installer to show its GUI. You'll be presented with available features, including changing app locale.