توضیحات:

List out available languages of current device.
Open locale settings for switching language quickly.

Useful to troubleshooting user complaint about their languages is not supported.

Good to install on testing / demo devices to ensure the purchasing phone / tablet includes languages that is needed.

If you want to change language quickly, you could try
https://play.google.com/store/apps/details?id=name.ratson.quact