Inspired by https://github.com/loadrunner/language-reset
Change Android TV language back to english
I think it's a LG HDMI CEC problem?
.apk at "releases" tab
After installing the app, you need to run this command: (adb needed)
adb shell pm grant sh.calvin.langchanger android.permission.CHANGE_CONFIGURATION
and then on the tv with your remote in hand, turn on Settings->Apps->Special app access->Modify system settings->lang changer